diff --git a/src/problem4/index.ts b/src/problem4/index.ts
new file mode 100644
index 0000000000..f89b32a99a
--- /dev/null
+++ b/src/problem4/index.ts
@@ -0,0 +1,24 @@
+// The complexity of this function is O(n) because it iterates through all numbers from 0 to n once.
+// The efficiency of this function is not optimal for large values of n, as it requires n iterations to compute the sum.
+// n is <= Math.MAX_SAFE_INTEGER, so we can safely compute the sum without worrying about overflow in JavaScript.
+function sum_to_n_a(n: number): number {
+  let count = 0
+  for (let i = 0; i <= n; i++) {
+    count += i
+  }
+  return count
+}
+
+// The complexity of this function is O(1) because it uses a constant number of operations to compute the sum, regardless of the value of n.
+// The efficiency of this function is optimal for all values of n, as it computes the sum in constant time.
+// n is <= Math.MAX_SAFE_INTEGER, so we can safely compute the sum without worrying about overflow in JavaScript.
+function sum_to_n_b(n: number): number {
+  return (n * (n + 1)) / 2
+}
+
+// The complexity of this function is O(n) because it iterates through all numbers from 1 to n once using recursion.
+// The efficiency of this function is not optimal for large values of n, as it requires n iterations to compute the sum.
+// n is <= Math.MAX_SAFE_INTEGER, so we can safely compute the sum without worrying about overflow in JavaScript.
+function sum_to_n_c(n: number): number {
+  return n === 0 ? 0 : n + sum_to_n_c(n - 1)
+}
diff --git a/src/problem5/express-ts/.gitignore b/src/problem5/express-ts/.gitignore
new file mode 100644
index 0000000000..90d1200bf2
--- /dev/null
+++ b/src/problem5/express-ts/.gitignore
@@ -0,0 +1,5 @@
+
+
+
+.env
+node_modules/
\ No newline at end of file
diff --git a/src/problem5/express-ts/README.md b/src/problem5/express-ts/README.md
new file mode 100644
index 0000000000..e8573f6c8b
--- /dev/null
+++ b/src/problem5/express-ts/README.md
@@ -0,0 +1,156 @@
+# Express TypeScript Product API
+
+A simple REST API built with Express, TypeScript, and MongoDB (Mongoose) for managing products.
+
+## Features
+
+- Health check endpoint
+- Create, read, update, and delete products
+- List products with pagination and optional filters
+- MongoDB connection via environment variables
+
+## Tech Stack
+
+- Node.js
+- Express
+- TypeScript
+- Mongoose
+- dotenv
+
+## Project Structure
+
+```text
+src/
+  index.ts                 # app entrypoint
+  configs/
+    index.ts               # config initializer
+    mongodb.ts             # MongoDB connection
+  controllers/
+    product.controller.ts  # product handlers
+  models/
+    products.model.ts      # product schema/model
+  routes/
+    index.ts               # base router
+    product.route.ts       # product routes
+```
+
+## Prerequisites
+
+- Node.js 18+
+- npm or yarn
+- A MongoDB instance (local or cloud)
+
+## Environment Variables
+
+Create a `.env` file in the project root:
+
+```env
+MONGO_URI=mongodb://localhost:27017
+MONGO_DB=your_database_name
+```
+
+## Installation
+
+Using npm:
+
+```bash
+npm install
+```
+
+Using yarn:
+
+```bash
+yarn install
+```
+
+## Run the App
+
+Development mode (with auto-reload):
+
+```bash
+npm run dev
+```
+
+Start mode:
+
+```bash
+npm start
+```
+
+The server runs on:
+
+```text
+http://localhost:3000
+```
+
+## API Endpoints
+
+Base path: `/api`
+
+### Health Check
+
+- `GET /healthcheck`
+
+Response:
+
+```json
+{ "status": "ok" }
+```
+
+### Create Product
+
+- `POST /api/product`
+
+Request body:
+
+```json
+{
+  "name": "Keyboard",
+  "price": 49.99,
+  "description": "Mechanical keyboard"
+}
+```
+
+### Get Product by ID
+
+- `GET /api/product/:id`
+
+### Update Product
+
+- `PUT /api/product/:id`
+
+Request body (any updatable fields):
+
+```json
+{
+  "name": "Keyboard Pro",
+  "price": 79.99,
+  "description": "Updated description"
+}
+```
+
+### Delete Product
+
+- `DELETE /api/product/:id`
+
+### Get All Products
+
+- `GET /api/products`
+
+Optional query params:
+
+- `page` (default: `1`)
+- `limit` (default: `10`)
+- `name` (case-insensitive partial match)
+- `price` (exact number match)
+
+Example:
+
+```http
+GET /api/products?page=1&limit=5&name=key&price=49.99
+```
+
+## Notes
+
+- If `MONGO_URI` or `MONGO_DB` is missing, the app will throw an error during startup.
+- JSON request parsing is enabled globally.
diff --git a/src/problem5/express-ts/package.json b/src/problem5/express-ts/package.json
new file mode 100644
index 0000000000..8c8c87b018
--- /dev/null
+++ b/src/problem5/express-ts/package.json
@@ -0,0 +1,23 @@
+{
+  "name": "express-ts",
+  "version": "1.0.0",
+  "main": "index.js",
+  "license": "MIT",
+  "dependencies": {
+    "dotenv": "^17.4.1",
+    "express": "^5.2.1",
+    "mongoose": "^9.4.1"
+  },
+  "devDependencies": {
+    "@types/express": "^5.0.6",
+    "@types/node": "^25.6.0",
+    "nodemon": "^3.1.14",
+    "ts-node": "^10.9.2",
+    "typescript": "^6.0.2"
+  },
+  "scripts": {
+    "start": "ts-node src/index.ts",
+    "dev": "nodemon --watch 'src/**/*.ts' --exec 'ts-node' src/index.ts"
+  },
+  "type": "commonjs"
+}
diff --git a/src/problem5/express-ts/src/configs/index.ts b/src/problem5/express-ts/src/configs/index.ts
new file mode 100644
index 0000000000..2363642fcb
--- /dev/null
+++ b/src/problem5/express-ts/src/configs/index.ts
@@ -0,0 +1,11 @@
+import { connectToMongoDB } from './mongodb'
+
+export const initConfigs = async () => {
+  try {
+    await connectToMongoDB()
+    console.log('All configurations initialized successfully')
+  } catch (error) {
+    console.error('Error initializing configurations:', error)
+    throw error
+  }
+}
diff --git a/src/problem5/express-ts/src/configs/mongodb.ts b/src/problem5/express-ts/src/configs/mongodb.ts
new file mode 100644
index 0000000000..e840e1c807
--- /dev/null
+++ b/src/problem5/express-ts/src/configs/mongodb.ts
@@ -0,0 +1,20 @@
+import { connect } from 'mongoose'
+
+export const connectToMongoDB = async () => {
+  try {
+    const mongoUri = process.env['MONGO_URI']
+    const dbName = process.env['MONGO_DB']
+    if (!mongoUri || !dbName) {
+      throw new Error(
+        'MONGO_URI and MONGO_DB must be defined in environment variables'
+      )
+    }
+    await connect(mongoUri, {
+      dbName: dbName
+    })
+    console.log('Connected to MongoDB')
+  } catch (error) {
+    console.error('Error connecting to MongoDB:', error)
+    throw error
+  }
+}
diff --git a/src/problem5/express-ts/src/controllers/product.controller.ts b/src/problem5/express-ts/src/controllers/product.controller.ts
new file mode 100644
index 0000000000..9778e0b851
--- /dev/null
+++ b/src/problem5/express-ts/src/controllers/product.controller.ts
@@ -0,0 +1,107 @@
+import { Request, Response } from 'express'
+import Product from '../models/products.model'
+
+export const createProduct = async (req: Request, res: Response) => {
+  try {
+    const { name, price, description } = req.body as {
+      name: string
+      price: number
+      description?: string
+    }
+
+    if (!name || !price) {
+      return res.status(400).json({ error: 'Name and price are required' })
+    }
+
+    const product = new Product({ name, price, description })
+    await product.save()
+    return res.status(201).json({
+      status: 'success',
+      message: 'Product created successfully'
+    })
+  } catch (error: any) {
+    return res.status(400).json({ error: error.message })
+  }
+}
+
+export const getProducts = async (req: Request, res: Response) => {
+  try {
+    const {
+      page = 1,
+      limit = 10,
+      name,
+      price
+    } = req.query as {
+      page?: string
+      limit?: string
+      name?: string
+      price?: string
+    }
+    const products = await Product.find({
+      ...(name && { name: { $regex: name, $options: 'i' } }),
+      ...(price && { price: Number(price) })
+    })
+      .skip((Number(page) - 1) * Number(limit))
+      .limit(Number(limit))
+    return res.status(200).json({
+      status: 'success',
+      data: products
+    })
+  } catch (error: any) {
+    return res.status(400).json({ error: error.message })
+  }
+}
+
+export const getProductById = async (req: Request, res: Response) => {
+  try {
+    const { id } = req.params
+    const product = await Product.findById(id)
+    if (!product) {
+      return res.status(404).json({ error: 'Product not found' })
+    }
+    return res.status(200).json({
+      status: 'success',
+      data: product
+    })
+  } catch (error: any) {
+    return res.status(400).json({ error: error.message })
+  }
+}
+
+export const updateProduct = async (req: Request, res: Response) => {
+  try {
+    const { id } = req.params
+    const { name, price, description } = req.body
+    const product = await Product.findByIdAndUpdate(
+      id,
+      { name, price, description },
+      { new: true }
+    )
+    if (!product) {
+      return res.status(404).json({ error: 'Product not found' })
+    }
+    return res.status(200).json({
+      status: 'success',
+      message: 'Product updated successfully',
+      data: product
+    })
+  } catch (error: any) {
+    return res.status(400).json({ error: error.message })
+  }
+}
+
+export const deleteProduct = async (req: Request, res: Response) => {
+  try {
+    const { id } = req.params
+    const product = await Product.findByIdAndDelete(id)
+    if (!product) {
+      return res.status(404).json({ error: 'Product not found' })
+    }
+    return res.status(200).json({
+      status: 'success',
+      message: 'Product deleted successfully'
+    })
+  } catch (error: any) {
+    return res.status(400).json({ error: error.message })
+  }
+}
diff --git a/src/problem5/express-ts/src/index.ts b/src/problem5/express-ts/src/index.ts
new file mode 100644
index 0000000000..dfb9566001
--- /dev/null
+++ b/src/problem5/express-ts/src/index.ts
@@ -0,0 +1,29 @@
+import express from 'express'
+import type { Application, Request, Response } from 'express'
+import { initConfigs } from './configs'
+import dotenv from 'dotenv'
+import routes from './routes'
+
+dotenv.config({
+  debug: true,
+  override: true,
+  encoding: 'utf8'
+})
+
+const port = 3000
+const app: Application = express()
+
+app.use(express.json({ strict: false }))
+app.use(express.urlencoded({ extended: false }))
+
+initConfigs()
+
+app.get('/healthcheck', (_: Request, res: Response) => {
+  res.status(200).json({ status: 'ok' })
+})
+
+app.use(routes)
+
+app.listen(port, () => {
+  console.log(`Server running at http://localhost:${port}`)
+})
diff --git a/src/problem5/express-ts/src/models/products.model.ts b/src/problem5/express-ts/src/models/products.model.ts
new file mode 100644
index 0000000000..f153703cb9
--- /dev/null
+++ b/src/problem5/express-ts/src/models/products.model.ts
@@ -0,0 +1,10 @@
+import { model, Schema } from 'mongoose'
+
+const productSchema = new Schema({
+  name: { type: String, required: true },
+  price: { type: Number, required: true },
+  description: { type: String }
+})
+
+const Product = model('Product', productSchema)
+export default Product
diff --git a/src/problem5/express-ts/src/routes/index.ts b/src/problem5/express-ts/src/routes/index.ts
new file mode 100644
index 0000000000..e5ab1ce6cd
--- /dev/null
+++ b/src/problem5/express-ts/src/routes/index.ts
@@ -0,0 +1,8 @@
+import { Router } from 'express'
+import productRoutes from './product.route'
+
+const router = Router()
+
+router.use('/api', productRoutes)
+
+export default router
diff --git a/src/problem5/express-ts/src/routes/product.route.ts b/src/problem5/express-ts/src/routes/product.route.ts
new file mode 100644
index 0000000000..581f1cad9b
--- /dev/null
+++ b/src/problem5/express-ts/src/routes/product.route.ts
@@ -0,0 +1,27 @@
+import { Router } from 'express'
+import {
+  createProduct,
+  deleteProduct,
+  getProductById,
+  getProducts,
+  updateProduct
+} from '../controllers/product.controller'
+
+const router = Router()
+
+// GET product by ID
+router.get('/product/:id', getProductById)
+
+// POST create new product
+router.post('/product', createProduct)
+
+// PUT update product
+router.put('/product/:id', updateProduct)
+
+// DELETE product
+router.delete('/product/:id', deleteProduct)
+
+// GET all products
+router.get('/products', getProducts)
+
+export default router
diff --git a/src/problem5/express-ts/tsconfig.json b/src/problem5/express-ts/tsconfig.json
new file mode 100644
index 0000000000..a582c32afa
--- /dev/null
+++ b/src/problem5/express-ts/tsconfig.json
@@ -0,0 +1,43 @@
+{
+  // Visit https://aka.ms/tsconfig to read more about this file
+  "compilerOptions": {
+    // File Layout
+    "rootDir": "./src",
+    "outDir": "./dist",
+
+    // Environment Settings
+    // See also https://aka.ms/tsconfig/module
+    "module": "commonjs",
+    "target": "es2020",
+    // For nodejs:
+    "lib": ["es2020"],
+    "types": ["node", "express"],
+    // and npm install -D @types/node @types/express
+
+    // Other Outputs
+    "sourceMap": true,
+    "declaration": true,
+    "declarationMap": true,
+
+    // Stricter Typechecking Options
+    "noUncheckedIndexedAccess": true,
+    "exactOptionalPropertyTypes": true,
+
+    // Style Options
+    "noImplicitReturns": true,
+    "noImplicitOverride": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noFallthroughCasesInSwitch": true,
+    "noPropertyAccessFromIndexSignature": true,
+
+    // Recommended Options
+    "strict": true,
+    "isolatedModules": true,
+    "noUncheckedSideEffectImports": true,
+    "moduleDetection": "force",
+    "skipLibCheck": true,
+    "esModuleInterop": true,
+    "allowSyntheticDefaultImports": true
+  }
+}
diff --git a/src/problem5/express-ts/yarn.lock b/src/problem5/express-ts/yarn.lock
new file mode 100644
index 0000000000..acfbdc2001
--- /dev/null
+++ b/src/problem5/express-ts/yarn.lock
@@ -0,0 +1,961 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+"@cspotcode/source-map-support@^0.8.0":
+  version "0.8.1"
+  resolved "https://registry.yarnpkg.com/@cspotcode/source-map-support/-/source-map-support-0.8.1.tgz#00629c35a688e05a88b1cda684fb9d5e73f000a1"
+  integrity sha512-IchNf6dN4tHoMFIn/7OE8LWZ19Y6q/67Bmf6vnGREv8RSbBVb9LPJxEcnwrcwX6ixSvaiGoomAUvu4YSxXrVgw==
+  dependencies:
+    "@jridgewell/trace-mapping" "0.3.9"
+
+"@jridgewell/resolve-uri@^3.0.3":
+  version "3.1.2"
+  resolved "https://registry.yarnpkg.com/@jridgewell/resolve-uri/-/resolve-uri-3.1.2.tgz#7a0ee601f60f99a20c7c7c5ff0c80388c1189bd6"
+  integrity sha512-bRISgCIjP20/tbWSPWMEi54QVPRZExkuD9lJL+UIxUKtwVJA8wW1Trb1jMs1RFXo1CBTNZ/5hpC9QvmKWdopKw==
+
+"@jridgewell/sourcemap-codec@^1.4.10":
+  version "1.5.5"
+  resolved "https://registry.yarnpkg.com/@jridgewell/sourcemap-codec/-/sourcemap-codec-1.5.5.tgz#6912b00d2c631c0d15ce1a7ab57cd657f2a8f8ba"
+  integrity sha512-cYQ9310grqxueWbl+WuIUIaiUaDcj7WOq5fVhEljNVgRfOUhY9fy2zTvfoqWsnebh8Sl70VScFbICvJnLKB0Og==
+
+"@jridgewell/trace-mapping@0.3.9":
+  version "0.3.9"
+  resolved "https://registry.yarnpkg.com/@jridgewell/trace-mapping/-/trace-mapping-0.3.9.tgz#6534fd5933a53ba7cbf3a17615e273a0d1273ff9"
+  integrity sha512-3Belt6tdc8bPgAtbcmdtNJlirVoTmEb5e2gC94PnkwEW9jI6CAHUeoG85tjWP5WquqfavoMtMwiG4P926ZKKuQ==
+  dependencies:
+    "@jridgewell/resolve-uri" "^3.0.3"
+    "@jridgewell/sourcemap-codec" "^1.4.10"
+
+"@mongodb-js/saslprep@^1.3.0":
+  version "1.4.6"
+  resolved "https://registry.yarnpkg.com/@mongodb-js/saslprep/-/saslprep-1.4.6.tgz#2edf5819fa0e69d86059f44d1fe57ae9d7817c12"
+  integrity sha512-y+x3H1xBZd38n10NZF/rEBlvDOOMQ6LKUTHqr8R9VkJ+mmQOYtJFxIlkkK8fZrtOiL6VixbOBWMbZGBdal3Z1g==
+  dependencies:
+    sparse-bitfield "^3.0.3"
+
+"@tsconfig/node10@^1.0.7":
+  version "1.0.12"
+  resolved "https://registry.yarnpkg.com/@tsconfig/node10/-/node10-1.0.12.tgz#be57ceac1e4692b41be9de6be8c32a106636dba4"
+  integrity sha512-UCYBaeFvM11aU2y3YPZ//O5Rhj+xKyzy7mvcIoAjASbigy8mHMryP5cK7dgjlz2hWxh1g5pLw084E0a/wlUSFQ==
+
+"@tsconfig/node12@^1.0.7":
+  version "1.0.11"
+  resolved "https://registry.yarnpkg.com/@tsconfig/node12/-/node12-1.0.11.tgz#ee3def1f27d9ed66dac6e46a295cffb0152e058d"
+  integrity sha512-cqefuRsh12pWyGsIoBKJA9luFu3mRxCA+ORZvA4ktLSzIuCUtWVxGIuXigEwO5/ywWFMZ2QEGKWvkZG1zDMTag==
+
+"@tsconfig/node14@^1.0.0":
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/@tsconfig/node14/-/node14-1.0.3.tgz#e4386316284f00b98435bf40f72f75a09dabf6c1"
+  integrity sha512-ysT8mhdixWK6Hw3i1V2AeRqZ5WfXg1G43mqoYlM2nc6388Fq5jcXyr5mRsqViLx/GJYdoL0bfXD8nmF+Zn/Iow==
+
+"@tsconfig/node16@^1.0.2":
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/@tsconfig/node16/-/node16-1.0.4.tgz#0b92dcc0cc1c81f6f306a381f28e31b1a56536e9"
+  integrity sha512-vxhUy4J8lyeyinH7Azl1pdd43GJhZH/tP2weN8TntQblOY+A0XbT8DJk1/oCPuOOyg/Ja757rG0CgHcWC8OfMA==
+
+"@types/body-parser@*":
+  version "1.19.6"
+  resolved "https://registry.yarnpkg.com/@types/body-parser/-/body-parser-1.19.6.tgz#1859bebb8fd7dac9918a45d54c1971ab8b5af474"
+  integrity sha512-HLFeCYgz89uk22N5Qg3dvGvsv46B8GLvKKo1zKG4NybA8U2DiEO3w9lqGg29t/tfLRJpJ6iQxnVw4OnB7MoM9g==
+  dependencies:
+    "@types/connect" "*"
+    "@types/node" "*"
+
+"@types/connect@*":
+  version "3.4.38"
+  resolved "https://registry.yarnpkg.com/@types/connect/-/connect-3.4.38.tgz#5ba7f3bc4fbbdeaff8dded952e5ff2cc53f8d858"
+  integrity sha512-K6uROf1LD88uDQqJCktA4yzL1YYAK6NgfsI0v/mTgyPKWsX1CnJ0XPSDhViejru1GcRkLWb8RlzFYJRqGUbaug==
+  dependencies:
+    "@types/node" "*"
+
+"@types/express-serve-static-core@^5.0.0":
+  version "5.1.1"
+  resolved "https://registry.yarnpkg.com/@types/express-serve-static-core/-/express-serve-static-core-5.1.1.tgz#1a77faffee9572d39124933259be2523837d7eaa"
+  integrity sha512-v4zIMr/cX7/d2BpAEX3KNKL/JrT1s43s96lLvvdTmza1oEvDudCqK9aF/djc/SWgy8Yh0h30TZx5VpzqFCxk5A==
+  dependencies:
+    "@types/node" "*"
+    "@types/qs" "*"
+    "@types/range-parser" "*"
+    "@types/send" "*"
+
+"@types/express@^5.0.6":
+  version "5.0.6"
+  resolved "https://registry.yarnpkg.com/@types/express/-/express-5.0.6.tgz#2d724b2c990dcb8c8444063f3580a903f6d500cc"
+  integrity sha512-sKYVuV7Sv9fbPIt/442koC7+IIwK5olP1KWeD88e/idgoJqDm3JV/YUiPwkoKK92ylff2MGxSz1CSjsXelx0YA==
+  dependencies:
+    "@types/body-parser" "*"
+    "@types/express-serve-static-core" "^5.0.0"
+    "@types/serve-static" "^2"
+
+"@types/http-errors@*":
+  version "2.0.5"
+  resolved "https://registry.yarnpkg.com/@types/http-errors/-/http-errors-2.0.5.tgz#5b749ab2b16ba113423feb1a64a95dcd30398472"
+  integrity sha512-r8Tayk8HJnX0FztbZN7oVqGccWgw98T/0neJphO91KkmOzug1KkofZURD4UaD5uH8AqcFLfdPErnBod0u71/qg==
+
+"@types/node@*", "@types/node@^25.6.0":
+  version "25.6.0"
+  resolved "https://registry.yarnpkg.com/@types/node/-/node-25.6.0.tgz#4e09bad9b469871f2d0f68140198cbd714f4edca"
+  integrity sha512-+qIYRKdNYJwY3vRCZMdJbPLJAtGjQBudzZzdzwQYkEPQd+PJGixUL5QfvCLDaULoLv+RhT3LDkwEfKaAkgSmNQ==
+  dependencies:
+    undici-types "~7.19.0"
+
+"@types/qs@*":
+  version "6.15.0"
+  resolved "https://registry.yarnpkg.com/@types/qs/-/qs-6.15.0.tgz#963ab61779843fe910639a50661b48f162bc7f79"
+  integrity sha512-JawvT8iBVWpzTrz3EGw9BTQFg3BQNmwERdKE22vlTxawwtbyUSlMppvZYKLZzB5zgACXdXxbD3m1bXaMqP/9ow==
+
+"@types/range-parser@*":
+  version "1.2.7"
+  resolved "https://registry.yarnpkg.com/@types/range-parser/-/range-parser-1.2.7.tgz#50ae4353eaaddc04044279812f52c8c65857dbcb"
+  integrity sha512-hKormJbkJqzQGhziax5PItDUTMAM9uE2XXQmM37dyd4hVM+5aVl7oVxMVUiVQn2oCQFN/LKCZdvSM0pFRqbSmQ==
+
+"@types/send@*":
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/@types/send/-/send-1.2.1.tgz#6a784e45543c18c774c049bff6d3dbaf045c9c74"
+  integrity sha512-arsCikDvlU99zl1g69TcAB3mzZPpxgw0UQnaHeC1Nwb015xp8bknZv5rIfri9xTOcMuaVgvabfIRA7PSZVuZIQ==
+  dependencies:
+    "@types/node" "*"
+
+"@types/serve-static@^2":
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/@types/serve-static/-/serve-static-2.2.0.tgz#d4a447503ead0d1671132d1ab6bd58b805d8de6a"
+  integrity sha512-8mam4H1NHLtu7nmtalF7eyBH14QyOASmcxHhSfEoRyr0nP/YdoesEtU+uSRvMe96TW/HPTtkoKqQLl53N7UXMQ==
+  dependencies:
+    "@types/http-errors" "*"
+    "@types/node" "*"
+
+"@types/webidl-conversions@*":
+  version "7.0.3"
+  resolved "https://registry.yarnpkg.com/@types/webidl-conversions/-/webidl-conversions-7.0.3.tgz#1306dbfa53768bcbcfc95a1c8cde367975581859"
+  integrity sha512-CiJJvcRtIgzadHCYXw7dqEnMNRjhGZlYK05Mj9OyktqV8uVT8fD2BFOB7S1uwBE3Kj2Z+4UyPmFw/Ixgw/LAlA==
+
+"@types/whatwg-url@^13.0.0":
+  version "13.0.0"
+  resolved "https://registry.yarnpkg.com/@types/whatwg-url/-/whatwg-url-13.0.0.tgz#2b11e32772fd321c0dedf4d655953ea8ce587b2a"
+  integrity sha512-N8WXpbE6Wgri7KUSvrmQcqrMllKZ9uxkYWMt+mCSGwNc0Hsw9VQTW7ApqI4XNrx6/SaM2QQJCzMPDEXE058s+Q==
+  dependencies:
+    "@types/webidl-conversions" "*"
+
+accepts@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/accepts/-/accepts-2.0.0.tgz#bbcf4ba5075467f3f2131eab3cffc73c2f5d7895"
+  integrity sha512-5cvg6CtKwfgdmVqY1WIiXKc3Q1bkRqGLi+2W/6ao+6Y7gu/RCwRuAhGEzh5B4KlszSuTLgZYuqFqo5bImjNKng==
+  dependencies:
+    mime-types "^3.0.0"
+    negotiator "^1.0.0"
+
+acorn-walk@^8.1.1:
+  version "8.3.5"
+  resolved "https://registry.yarnpkg.com/acorn-walk/-/acorn-walk-8.3.5.tgz#8a6b8ca8fc5b34685af15dabb44118663c296496"
+  integrity sha512-HEHNfbars9v4pgpW6SO1KSPkfoS0xVOM/9UzkJltjlsHZmJasxg8aXkuZa7SMf8vKGIBhpUsPluQSqhJFCqebw==
+  dependencies:
+    acorn "^8.11.0"
+
+acorn@^8.11.0, acorn@^8.4.1:
+  version "8.16.0"
+  resolved "https://registry.yarnpkg.com/acorn/-/acorn-8.16.0.tgz#4ce79c89be40afe7afe8f3adb902a1f1ce9ac08a"
+  integrity sha512-UVJyE9MttOsBQIDKw1skb9nAwQuR5wuGD3+82K6JgJlm/Y+KI92oNsMNGZCYdDsVtRHSak0pcV5Dno5+4jh9sw==
+
+anymatch@~3.1.2:
+  version "3.1.3"
+  resolved "https://registry.yarnpkg.com/anymatch/-/anymatch-3.1.3.tgz#790c58b19ba1720a84205b57c618d5ad8524973e"
+  integrity sha512-KMReFUr0B4t+D+OBkjR3KYqvocp2XaSzO55UcB6mgQMd3KbcE+mWTyvVV7D/zsdEbNnV6acZUutkiHQXvTr1Rw==
+  dependencies:
+    normalize-path "^3.0.0"
+    picomatch "^2.0.4"
+
+arg@^4.1.0:
+  version "4.1.3"
+  resolved "https://registry.yarnpkg.com/arg/-/arg-4.1.3.tgz#269fc7ad5b8e42cb63c896d5666017261c144089"
+  integrity sha512-58S9QDqG0Xx27YwPSt9fJxivjYl432YCwfDMfZ+71RAqUrZef7LrKQZ3LHLOwCS4FLNBplP533Zx895SeOCHvA==
+
+balanced-match@^4.0.2:
+  version "4.0.4"
+  resolved "https://registry.yarnpkg.com/balanced-match/-/balanced-match-4.0.4.tgz#bfb10662feed8196a2c62e7c68e17720c274179a"
+  integrity sha512-BLrgEcRTwX2o6gGxGOCNyMvGSp35YofuYzw9h1IMTRmKqttAZZVU67bdb9Pr2vUHA8+j3i2tJfjO6C6+4myGTA==
+
+binary-extensions@^2.0.0:
+  version "2.3.0"
+  resolved "https://registry.yarnpkg.com/binary-extensions/-/binary-extensions-2.3.0.tgz#f6e14a97858d327252200242d4ccfe522c445522"
+  integrity sha512-Ceh+7ox5qe7LJuLHoY0feh3pHuUDHAcRUeyL2VYghZwfpkNIy/+8Ocg0a3UuSoYzavmylwuLWQOf3hl0jjMMIw==
+
+body-parser@^2.2.1:
+  version "2.2.2"
+  resolved "https://registry.yarnpkg.com/body-parser/-/body-parser-2.2.2.tgz#1a32cdb966beaf68de50a9dfbe5b58f83cb8890c"
+  integrity sha512-oP5VkATKlNwcgvxi0vM0p/D3n2C3EReYVX+DNYs5TjZFn/oQt2j+4sVJtSMr18pdRr8wjTcBl6LoV+FUwzPmNA==
+  dependencies:
+    bytes "^3.1.2"
+    content-type "^1.0.5"
+    debug "^4.4.3"
+    http-errors "^2.0.0"
+    iconv-lite "^0.7.0"
+    on-finished "^2.4.1"
+    qs "^6.14.1"
+    raw-body "^3.0.1"
+    type-is "^2.0.1"
+
+brace-expansion@^5.0.5:
+  version "5.0.5"
+  resolved "https://registry.yarnpkg.com/brace-expansion/-/brace-expansion-5.0.5.tgz#dcc3a37116b79f3e1b46db994ced5d570e930fdb"
+  integrity sha512-VZznLgtwhn+Mact9tfiwx64fA9erHH/MCXEUfB/0bX/6Fz6ny5EGTXYltMocqg4xFAQZtnO3DHWWXi8RiuN7cQ==
+  dependencies:
+    balanced-match "^4.0.2"
+
+braces@~3.0.2:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/braces/-/braces-3.0.3.tgz#490332f40919452272d55a8480adc0c441358789"
+  integrity sha512-yQbXgO/OSZVD2IsiLlro+7Hf6Q18EJrKSEsdoMzKePKXct3gvD8oLcOQdIzGupr5Fj+EDe8gO/lxc1BzfMpxvA==
+  dependencies:
+    fill-range "^7.1.1"
+
+bson@^7.1.1:
+  version "7.2.0"
+  resolved "https://registry.yarnpkg.com/bson/-/bson-7.2.0.tgz#1a496a42d9ff130b9f3ab8efd465459c758c747f"
+  integrity sha512-YCEo7KjMlbNlyHhz7zAZNDpIpQbd+wOEHJYezv0nMYTn4x31eIUM2yomNNubclAt63dObUzKHWsBLJ9QcZNSnQ==
+
+bytes@^3.1.2, bytes@~3.1.2:
+  version "3.1.2"
+  resolved "https://registry.yarnpkg.com/bytes/-/bytes-3.1.2.tgz#8b0beeb98605adf1b128fa4386403c009e0221a5"
+  integrity sha512-/Nf7TyzTx6S3yRJObOAV7956r8cr2+Oj8AC5dt8wSP3BQAoeX58NoHyCU8P8zGkNXStjTSi6fzO6F0pBdcYbEg==
+
+call-bind-apply-helpers@^1.0.1, call-bind-apply-helpers@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/call-bind-apply-helpers/-/call-bind-apply-helpers-1.0.2.tgz#4b5428c222be985d79c3d82657479dbe0b59b2d6"
+  integrity sha512-Sp1ablJ0ivDkSzjcaJdxEunN5/XvksFJ2sMBFfq6x0ryhQV/2b/KwFe21cMpmHtPOSij8K99/wSfoEuTObmuMQ==
+  dependencies:
+    es-errors "^1.3.0"
+    function-bind "^1.1.2"
+
+call-bound@^1.0.2:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/call-bound/-/call-bound-1.0.4.tgz#238de935d2a2a692928c538c7ccfa91067fd062a"
+  integrity sha512-+ys997U96po4Kx/ABpBCqhA9EuxJaQWDQg7295H4hBphv3IZg0boBKuwYpt4YXp6MZ5AmZQnU/tyMTlRpaSejg==
+  dependencies:
+    call-bind-apply-helpers "^1.0.2"
+    get-intrinsic "^1.3.0"
+
+chokidar@^3.5.2:
+  version "3.6.0"
+  resolved "https://registry.yarnpkg.com/chokidar/-/chokidar-3.6.0.tgz#197c6cc669ef2a8dc5e7b4d97ee4e092c3eb0d5b"
+  integrity sha512-7VT13fmjotKpGipCW9JEQAusEPE+Ei8nl6/g4FBAmIm0GOOLMua9NDDo/DWp0ZAxCr3cPq5ZpBqmPAQgDda2Pw==
+  dependencies:
+    anymatch "~3.1.2"
+    braces "~3.0.2"
+    glob-parent "~5.1.2"
+    is-binary-path "~2.1.0"
+    is-glob "~4.0.1"
+    normalize-path "~3.0.0"
+    readdirp "~3.6.0"
+  optionalDependencies:
+    fsevents "~2.3.2"
+
+content-disposition@^1.0.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/content-disposition/-/content-disposition-1.1.0.tgz#f3db789c752d45564cc7e9e1e0b31790d4a38e17"
+  integrity sha512-5jRCH9Z/+DRP7rkvY83B+yGIGX96OYdJmzngqnw2SBSxqCFPd0w2km3s5iawpGX8krnwSGmF0FW5Nhr0Hfai3g==
+
+content-type@^1.0.5:
+  version "1.0.5"
+  resolved "https://registry.yarnpkg.com/content-type/-/content-type-1.0.5.tgz#8b773162656d1d1086784c8f23a54ce6d73d7918"
+  integrity sha512-nTjqfcBFEipKdXCv4YDQWCfmcLZKm81ldF0pAopTvyrFGVbcR6P/VAAd5G7N+0tTr8QqiU0tFadD6FK4NtJwOA==
+
+cookie-signature@^1.2.1:
+  version "1.2.2"
+  resolved "https://registry.yarnpkg.com/cookie-signature/-/cookie-signature-1.2.2.tgz#57c7fc3cc293acab9fec54d73e15690ebe4a1793"
+  integrity sha512-D76uU73ulSXrD1UXF4KE2TMxVVwhsnCgfAyTg9k8P6KGZjlXKrOLe4dJQKI3Bxi5wjesZoFXJWElNWBjPZMbhg==
+
+cookie@^0.7.1:
+  version "0.7.2"
+  resolved "https://registry.yarnpkg.com/cookie/-/cookie-0.7.2.tgz#556369c472a2ba910f2979891b526b3436237ed7"
+  integrity sha512-yki5XnKuf750l50uGTllt6kKILY4nQ1eNIQatoXEByZ5dWgnKqbnqmTrBE5B4N7lrMJKQ2ytWMiTO2o0v6Ew/w==
+
+create-require@^1.1.0:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/create-require/-/create-require-1.1.1.tgz#c1d7e8f1e5f6cfc9ff65f9cd352d37348756c333"
+  integrity sha512-dcKFX3jn0MpIaXjisoRvexIJVEKzaq7z2rZKxf+MSr9TkdmHmsU4m2lcLojrj/FHl8mk5VxMmYA+ftRkP/3oKQ==
+
+debug@^4, debug@^4.4.0, debug@^4.4.3:
+  version "4.4.3"
+  resolved "https://registry.yarnpkg.com/debug/-/debug-4.4.3.tgz#c6ae432d9bd9662582fce08709b038c58e9e3d6a"
+  integrity sha512-RGwwWnwQvkVfavKVt22FGLw+xYSdzARwm0ru6DhTVA3umU5hZc28V3kO4stgYryrTlLpuvgI9GiijltAjNbcqA==
+  dependencies:
+    ms "^2.1.3"
+
+depd@^2.0.0, depd@~2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/depd/-/depd-2.0.0.tgz#b696163cc757560d09cf22cc8fad1571b79e76df"
+  integrity sha512-g7nH6P6dyDioJogAAGprGpCtVImJhpPk/roCzdb3fIh61/s/nPsfR6onyMwkCAR/OlC3yBC0lESvUoQEAssIrw==
+
+diff@^4.0.1:
+  version "4.0.4"
+  resolved "https://registry.yarnpkg.com/diff/-/diff-4.0.4.tgz#7a6dbfda325f25f07517e9b518f897c08332e07d"
+  integrity sha512-X07nttJQkwkfKfvTPG/KSnE2OMdcUCao6+eXF3wmnIQRn2aPAHH3VxDbDOdegkd6JbPsXqShpvEOHfAT+nCNwQ==
+
+dotenv@^17.4.1:
+  version "17.4.1"
+  resolved "https://registry.yarnpkg.com/dotenv/-/dotenv-17.4.1.tgz#d8e2179fe287365ef3aecb9459668454168eda88"
+  integrity sha512-k8DaKGP6r1G30Lx8V4+pCsLzKr8vLmV2paqEj1Y55GdAgJuIqpRp5FfajGF8KtwMxCz9qJc6wUIJnm053d/WCw==
+
+dunder-proto@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/dunder-proto/-/dunder-proto-1.0.1.tgz#d7ae667e1dc83482f8b70fd0f6eefc50da30f58a"
+  integrity sha512-KIN/nDJBQRcXw0MLVhZE9iQHmG68qAVIBg9CqmUYjmQIhgij9U5MFvrqkUL5FbtyyzZuOeOt0zdeRe4UY7ct+A==
+  dependencies:
+    call-bind-apply-helpers "^1.0.1"
+    es-errors "^1.3.0"
+    gopd "^1.2.0"
+
+ee-first@1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/ee-first/-/ee-first-1.1.1.tgz#590c61156b0ae2f4f0255732a158b266bc56b21d"
+  integrity sha512-WMwm9LhRUo+WUaRN+vRuETqG89IgZphVSNkdFgeb6sS/E4OrDIN7t48CAewSHXc6C8lefD8KKfr5vY61brQlow==
+
+encodeurl@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/encodeurl/-/encodeurl-2.0.0.tgz#7b8ea898077d7e409d3ac45474ea38eaf0857a58"
+  integrity sha512-Q0n9HRi4m6JuGIV1eFlmvJB7ZEVxu93IrMyiMsGC0lrMJMWzRgx6WGquyfQgZVb31vhGgXnfmPNNXmxnOkRBrg==
+
+es-define-property@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/es-define-property/-/es-define-property-1.0.1.tgz#983eb2f9a6724e9303f61addf011c72e09e0b0fa"
+  integrity sha512-e3nRfgfUZ4rNGL232gUgX06QNyyez04KdjFrF+LTRoOXmrOgFKDg4BCdsjW8EnT69eqdYGmRpJwiPVYNrCaW3g==
+
+es-errors@^1.3.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/es-errors/-/es-errors-1.3.0.tgz#05f75a25dab98e4fb1dcd5e1472c0546d5057c8f"
+  integrity sha512-Zf5H2Kxt2xjTvbJvP2ZWLEICxA6j+hAmMzIlypy4xcBg1vKVnx89Wy0GbS+kf5cwCVFFzdCFh2XSCFNULS6csw==
+
+es-object-atoms@^1.0.0, es-object-atoms@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/es-object-atoms/-/es-object-atoms-1.1.1.tgz#1c4f2c4837327597ce69d2ca190a7fdd172338c1"
+  integrity sha512-FGgH2h8zKNim9ljj7dankFPcICIK9Cp5bm+c2gQSYePhpaG5+esrLODihIorn+Pe6FGJzWhXQotPv73jTaldXA==
+  dependencies:
+    es-errors "^1.3.0"
+
+escape-html@^1.0.3:
+  version "1.0.3"
+  resolved "https://registry.yarnpkg.com/escape-html/-/escape-html-1.0.3.tgz#0258eae4d3d0c0974de1c169188ef0051d1d1988"
+  integrity sha512-NiSupZ4OeuGwr68lGIeym/ksIZMJodUGOSCZ/FSnTxcrekbvqrgdUxlJOMpijaKZVjAJrWrGs/6Jy8OMuyj9ow==
+
+etag@^1.8.1:
+  version "1.8.1"
+  resolved "https://registry.yarnpkg.com/etag/-/etag-1.8.1.tgz#41ae2eeb65efa62268aebfea83ac7d79299b0887"
+  integrity sha512-aIL5Fx7mawVa300al2BnEE4iNvo1qETxLrPI/o05L7z6go7fCw1J6EQmbK4FmJ2AS7kgVF/KEZWufBfdClMcPg==
+
+express@^5.2.1:
+  version "5.2.1"
+  resolved "https://registry.yarnpkg.com/express/-/express-5.2.1.tgz#8f21d15b6d327f92b4794ecf8cb08a72f956ac04"
+  integrity sha512-hIS4idWWai69NezIdRt2xFVofaF4j+6INOpJlVOLDO8zXGpUVEVzIYk12UUi2JzjEzWL3IOAxcTubgz9Po0yXw==
+  dependencies:
+    accepts "^2.0.0"
+    body-parser "^2.2.1"
+    content-disposition "^1.0.0"
+    content-type "^1.0.5"
+    cookie "^0.7.1"
+    cookie-signature "^1.2.1"
+    debug "^4.4.0"
+    depd "^2.0.0"
+    encodeurl "^2.0.0"
+    escape-html "^1.0.3"
+    etag "^1.8.1"
+    finalhandler "^2.1.0"
+    fresh "^2.0.0"
+    http-errors "^2.0.0"
+    merge-descriptors "^2.0.0"
+    mime-types "^3.0.0"
+    on-finished "^2.4.1"
+    once "^1.4.0"
+    parseurl "^1.3.3"
+    proxy-addr "^2.0.7"
+    qs "^6.14.0"
+    range-parser "^1.2.1"
+    router "^2.2.0"
+    send "^1.1.0"
+    serve-static "^2.2.0"
+    statuses "^2.0.1"
+    type-is "^2.0.1"
+    vary "^1.1.2"
+
+fill-range@^7.1.1:
+  version "7.1.1"
+  resolved "https://registry.yarnpkg.com/fill-range/-/fill-range-7.1.1.tgz#44265d3cac07e3ea7dc247516380643754a05292"
+  integrity sha512-YsGpe3WHLK8ZYi4tWDg2Jy3ebRz2rXowDxnld4bkQB00cc/1Zw9AWnC0i9ztDJitivtQvaI9KaLyKrc+hBW0yg==
+  dependencies:
+    to-regex-range "^5.0.1"
+
+finalhandler@^2.1.0:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/finalhandler/-/finalhandler-2.1.1.tgz#a2c517a6559852bcdb06d1f8bd7f51b68fad8099"
+  integrity sha512-S8KoZgRZN+a5rNwqTxlZZePjT/4cnm0ROV70LedRHZ0p8u9fRID0hJUZQpkKLzro8LfmC8sx23bY6tVNxv8pQA==
+  dependencies:
+    debug "^4.4.0"
+    encodeurl "^2.0.0"
+    escape-html "^1.0.3"
+    on-finished "^2.4.1"
+    parseurl "^1.3.3"
+    statuses "^2.0.1"
+
+forwarded@0.2.0:
+  version "0.2.0"
+  resolved "https://registry.yarnpkg.com/forwarded/-/forwarded-0.2.0.tgz#2269936428aad4c15c7ebe9779a84bf0b2a81811"
+  integrity sha512-buRG0fpBtRHSTCOASe6hD258tEubFoRLb4ZNA6NxMVHNw2gOcwHo9wyablzMzOA5z9xA9L1KNjk/Nt6MT9aYow==
+
+fresh@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/fresh/-/fresh-2.0.0.tgz#8dd7df6a1b3a1b3a5cf186c05a5dd267622635a4"
+  integrity sha512-Rx/WycZ60HOaqLKAi6cHRKKI7zxWbJ31MhntmtwMoaTeF7XFH9hhBp8vITaMidfljRQ6eYWCKkaTK+ykVJHP2A==
+
+fsevents@~2.3.2:
+  version "2.3.3"
+  resolved "https://registry.yarnpkg.com/fsevents/-/fsevents-2.3.3.tgz#cac6407785d03675a2a5e1a5305c697b347d90d6"
+  integrity sha512-5xoDfX+fL7faATnagmWPpbFtwh/R77WmMMqqHGS65C3vvB0YHrgF+B1YmZ3441tMj5n63k0212XNoJwzlhffQw==
+
+function-bind@^1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/function-bind/-/function-bind-1.1.2.tgz#2c02d864d97f3ea6c8830c464cbd11ab6eab7a1c"
+  integrity sha512-7XHNxH7qX9xG5mIwxkhumTox/MIRNcOgDrxWsMt2pAr23WHp6MrRlN7FBSFpCpr+oVO0F744iUgR82nJMfG2SA==
+
+get-intrinsic@^1.2.5, get-intrinsic@^1.3.0:
+  version "1.3.0"
+  resolved "https://registry.yarnpkg.com/get-intrinsic/-/get-intrinsic-1.3.0.tgz#743f0e3b6964a93a5491ed1bffaae054d7f98d01"
+  integrity sha512-9fSjSaos/fRIVIp+xSJlE6lfwhES7LNtKaCBIamHsjr2na1BiABJPo0mOjjz8GJDURarmCPGqaiVg5mfjb98CQ==
+  dependencies:
+    call-bind-apply-helpers "^1.0.2"
+    es-define-property "^1.0.1"
+    es-errors "^1.3.0"
+    es-object-atoms "^1.1.1"
+    function-bind "^1.1.2"
+    get-proto "^1.0.1"
+    gopd "^1.2.0"
+    has-symbols "^1.1.0"
+    hasown "^2.0.2"
+    math-intrinsics "^1.1.0"
+
+get-proto@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/get-proto/-/get-proto-1.0.1.tgz#150b3f2743869ef3e851ec0c49d15b1d14d00ee1"
+  integrity sha512-sTSfBjoXBp89JvIKIefqw7U2CCebsc74kiY6awiGogKtoSGbgjYE/G/+l9sF3MWFPNc9IcoOC4ODfKHfxFmp0g==
+  dependencies:
+    dunder-proto "^1.0.1"
+    es-object-atoms "^1.0.0"
+
+glob-parent@~5.1.2:
+  version "5.1.2"
+  resolved "https://registry.yarnpkg.com/glob-parent/-/glob-parent-5.1.2.tgz#869832c58034fe68a4093c17dc15e8340d8401c4"
+  integrity sha512-AOIgSQCepiJYwP3ARnGx+5VnTu2HBYdzbGP45eLw1vr3zB3vZLeyed1sC9hnbcOc9/SrMyM5RPQrkGz4aS9Zow==
+  dependencies:
+    is-glob "^4.0.1"
+
+gopd@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/gopd/-/gopd-1.2.0.tgz#89f56b8217bdbc8802bd299df6d7f1081d7e51a1"
+  integrity sha512-ZUKRh6/kUFoAiTAtTYPZJ3hw9wNxx+BIBOijnlG9PnrJsCcSjs1wyyD6vJpaYtgnzDrKYRSqf3OO6Rfa93xsRg==
+
+has-flag@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/has-flag/-/has-flag-3.0.0.tgz#b5d454dc2199ae225699f3467e5a07f3b955bafd"
+  integrity sha512-sKJf1+ceQBr4SMkvQnBDNDtf4TXpVhVGateu0t918bl30FnbE2m4vNLX+VWe/dpjlb+HugGYzW7uQXH98HPEYw==
+
+has-symbols@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/has-symbols/-/has-symbols-1.1.0.tgz#fc9c6a783a084951d0b971fe1018de813707a338"
+  integrity sha512-1cDNdwJ2Jaohmb3sg4OmKaMBwuC48sYni5HUw2DvsC8LjGTLK9h+eb1X6RyuOHe4hT0ULCW68iomhjUoKUqlPQ==
+
+hasown@^2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/hasown/-/hasown-2.0.2.tgz#003eaf91be7adc372e84ec59dc37252cedb80003"
+  integrity sha512-0hJU9SCPvmMzIBdZFqNPXWa6dqh7WdH0cII9y+CyS8rG3nL48Bclra9HmKhVVUHyPWNH5Y7xDwAB7bfgSjkUMQ==
+  dependencies:
+    function-bind "^1.1.2"
+
+http-errors@^2.0.0, http-errors@^2.0.1, http-errors@~2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/http-errors/-/http-errors-2.0.1.tgz#36d2f65bc909c8790018dd36fb4d93da6caae06b"
+  integrity sha512-4FbRdAX+bSdmo4AUFuS0WNiPz8NgFt+r8ThgNWmlrjQjt1Q7ZR9+zTlce2859x4KSXrwIsaeTqDoKQmtP8pLmQ==
+  dependencies:
+    depd "~2.0.0"
+    inherits "~2.0.4"
+    setprototypeof "~1.2.0"
+    statuses "~2.0.2"
+    toidentifier "~1.0.1"
+
+iconv-lite@^0.7.0, iconv-lite@~0.7.0:
+  version "0.7.2"
+  resolved "https://registry.yarnpkg.com/iconv-lite/-/iconv-lite-0.7.2.tgz#d0bdeac3f12b4835b7359c2ad89c422a4d1cc72e"
+  integrity sha512-im9DjEDQ55s9fL4EYzOAv0yMqmMBSZp6G0VvFyTMPKWxiSBHUj9NW/qqLmXUwXrrM7AvqSlTCfvqRb0cM8yYqw==
+  dependencies:
+    safer-buffer ">= 2.1.2 < 3.0.0"
+
+ignore-by-default@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/ignore-by-default/-/ignore-by-default-1.0.1.tgz#48ca6d72f6c6a3af00a9ad4ae6876be3889e2b09"
+  integrity sha512-Ius2VYcGNk7T90CppJqcIkS5ooHUZyIQK+ClZfMfMNFEF9VSE73Fq+906u/CWu92x4gzZMWOwfFYckPObzdEbA==
+
+inherits@~2.0.4:
+  version "2.0.4"
+  resolved "https://registry.yarnpkg.com/inherits/-/inherits-2.0.4.tgz#0fa2c64f932917c3433a0ded55363aae37416b7c"
+  integrity sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==
+
+ipaddr.js@1.9.1:
+  version "1.9.1"
+  resolved "https://registry.yarnpkg.com/ipaddr.js/-/ipaddr.js-1.9.1.tgz#bff38543eeb8984825079ff3a2a8e6cbd46781b3"
+  integrity sha512-0KI/607xoxSToH7GjN1FfSbLoU0+btTicjsQSWQlh/hZykN8KpmMf7uYwPW3R+akZ6R/w18ZlXSHBYXiYUPO3g==
+
+is-binary-path@~2.1.0:
+  version "2.1.0"
+  resolved "https://registry.yarnpkg.com/is-binary-path/-/is-binary-path-2.1.0.tgz#ea1f7f3b80f064236e83470f86c09c254fb45b09"
+  integrity sha512-ZMERYes6pDydyuGidse7OsHxtbI7WVeUEozgR/g7rd0xUimYNlvZRE/K2MgZTjWy725IfelLeVcEM97mmtRGXw==
+  dependencies:
+    binary-extensions "^2.0.0"
+
+is-extglob@^2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/is-extglob/-/is-extglob-2.1.1.tgz#a88c02535791f02ed37c76a1b9ea9773c833f8c2"
+  integrity sha512-SbKbANkN603Vi4jEZv49LeVJMn4yGwsbzZworEoyEiutsN3nJYdbO36zfhGJ6QEDpOZIFkDtnq5JRxmvl3jsoQ==
+
+is-glob@^4.0.1, is-glob@~4.0.1:
+  version "4.0.3"
+  resolved "https://registry.yarnpkg.com/is-glob/-/is-glob-4.0.3.tgz#64f61e42cbbb2eec2071a9dac0b28ba1e65d5084"
+  integrity sha512-xelSayHH36ZgE7ZWhli7pW34hNbNl8Ojv5KVmkJD4hBdD3th8Tfk9vYasLM+mXWOZhFkgZfxhLSnrwRr4elSSg==
+  dependencies:
+    is-extglob "^2.1.1"
+
+is-number@^7.0.0:
+  version "7.0.0"
+  resolved "https://registry.yarnpkg.com/is-number/-/is-number-7.0.0.tgz#7535345b896734d5f80c4d06c50955527a14f12b"
+  integrity sha512-41Cifkg6e8TylSpdtTpeLVMqvSBEVzTttHvERD741+pnZ8ANv0004MRL43QKPDlK9cGvNp6NZWZUBlbGXYxxng==
+
+is-promise@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/is-promise/-/is-promise-4.0.0.tgz#42ff9f84206c1991d26debf520dd5c01042dd2f3"
+  integrity sha512-hvpoI6korhJMnej285dSg6nu1+e6uxs7zG3BYAm5byqDsgJNWwxzM6z6iZiAgQR4TJ30JmBTOwqZUw3WlyH3AQ==
+
+kareem@3.2.0:
+  version "3.2.0"
+  resolved "https://registry.yarnpkg.com/kareem/-/kareem-3.2.0.tgz#8f69b25f9ceac80e9bc46b391008da7fc93d4ab0"
+  integrity sha512-VS8MWZz/cT+SqBCpVfNN4zoVz5VskR3N4+sTmUXme55e9avQHntpwpNq0yjnosISXqwJ3AQVjlbI4Dyzv//JtA==
+
+make-error@^1.1.1:
+  version "1.3.6"
+  resolved "https://registry.yarnpkg.com/make-error/-/make-error-1.3.6.tgz#2eb2e37ea9b67c4891f684a1394799af484cf7a2"
+  integrity sha512-s8UhlNe7vPKomQhC1qFelMokr/Sc3AgNbso3n74mVPA5LTZwkB9NlXf4XPamLxJE8h0gh73rM94xvwRT2CVInw==
+
+math-intrinsics@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/math-intrinsics/-/math-intrinsics-1.1.0.tgz#a0dd74be81e2aa5c2f27e65ce283605ee4e2b7f9"
+  integrity sha512-/IXtbwEk5HTPyEwyKX6hGkYXxM9nbj64B+ilVJnC/R6B0pH5G4V3b0pVbL7DBj4tkhBAppbQUlf6F6Xl9LHu1g==
+
+media-typer@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/media-typer/-/media-typer-1.1.0.tgz#6ab74b8f2d3320f2064b2a87a38e7931ff3a5561"
+  integrity sha512-aisnrDP4GNe06UcKFnV5bfMNPBUw4jsLGaWwWfnH3v02GnBuXX2MCVn5RbrWo0j3pczUilYblq7fQ7Nw2t5XKw==
+
+memory-pager@^1.0.2:
+  version "1.5.0"
+  resolved "https://registry.yarnpkg.com/memory-pager/-/memory-pager-1.5.0.tgz#d8751655d22d384682741c972f2c3d6dfa3e66b5"
+  integrity sha512-ZS4Bp4r/Zoeq6+NLJpP+0Zzm0pR8whtGPf1XExKLJBAczGMnSi3It14OiNCStjQjM6NU1okjQGSxgEZN8eBYKg==
+
+merge-descriptors@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/merge-descriptors/-/merge-descriptors-2.0.0.tgz#ea922f660635a2249ee565e0449f951e6b603808"
+  integrity sha512-Snk314V5ayFLhp3fkUREub6WtjBfPdCPY1Ln8/8munuLuiYhsABgBVWsozAG+MWMbVEvcdcpbi9R7ww22l9Q3g==
+
+mime-db@^1.54.0:
+  version "1.54.0"
+  resolved "https://registry.yarnpkg.com/mime-db/-/mime-db-1.54.0.tgz#cddb3ee4f9c64530dff640236661d42cb6a314f5"
+  integrity sha512-aU5EJuIN2WDemCcAp2vFBfp/m4EAhWJnUNSSw0ixs7/kXbd6Pg64EmwJkNdFhB8aWt1sH2CTXrLxo/iAGV3oPQ==
+
+mime-types@^3.0.0, mime-types@^3.0.2:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/mime-types/-/mime-types-3.0.2.tgz#39002d4182575d5af036ffa118100f2524b2e2ab"
+  integrity sha512-Lbgzdk0h4juoQ9fCKXW4by0UJqj+nOOrI9MJ1sSj4nI8aI2eo1qmvQEie4VD1glsS250n15LsWsYtCugiStS5A==
+  dependencies:
+    mime-db "^1.54.0"
+
+minimatch@^10.2.1:
+  version "10.2.5"
+  resolved "https://registry.yarnpkg.com/minimatch/-/minimatch-10.2.5.tgz#bd48687a0be38ed2961399105600f832095861d1"
+  integrity sha512-MULkVLfKGYDFYejP07QOurDLLQpcjk7Fw+7jXS2R2czRQzR56yHRveU5NDJEOviH+hETZKSkIk5c+T23GjFUMg==
+  dependencies:
+    brace-expansion "^5.0.5"
+
+mongodb-connection-string-url@^7.0.0:
+  version "7.0.1"
+  resolved "https://registry.yarnpkg.com/mongodb-connection-string-url/-/mongodb-connection-string-url-7.0.1.tgz#347b664cd9e6ddff10d5c1c6010d6d8dbfe9272d"
+  integrity sha512-h0AZ9A7IDVwwHyMxmdMXKy+9oNlF0zFoahHiX3vQ8e3KFcSP3VmsmfvtRSuLPxmyv2vjIDxqty8smTgie/SNRQ==
+  dependencies:
+    "@types/whatwg-url" "^13.0.0"
+    whatwg-url "^14.1.0"
+
+mongodb@~7.1:
+  version "7.1.1"
+  resolved "https://registry.yarnpkg.com/mongodb/-/mongodb-7.1.1.tgz#d08479221b81ba66f1f4a858af621edaaa598d95"
+  integrity sha512-067DXiMjcpYQl6bGjWQoTUEE9UoRViTtKFcoqX7z08I+iDZv/emH1g8XEFiO3qiDfXAheT5ozl1VffDTKhIW/w==
+  dependencies:
+    "@mongodb-js/saslprep" "^1.3.0"
+    bson "^7.1.1"
+    mongodb-connection-string-url "^7.0.0"
+
+mongoose@^9.4.1:
+  version "9.4.1"
+  resolved "https://registry.yarnpkg.com/mongoose/-/mongoose-9.4.1.tgz#a329c6b99c417bdc3be7cab32fad840051a1b7b0"
+  integrity sha512-4rFBWa+/wdBQSfvnOPJBpiSG6UCEbhSQh865dEdaH9Y8WfHBUC+I2XT28dp0IBIGrEwmh+gzrgZgea5PbmrHWA==
+  dependencies:
+    kareem "3.2.0"
+    mongodb "~7.1"
+    mpath "0.9.0"
+    mquery "6.0.0"
+    ms "2.1.3"
+    sift "17.1.3"
+
+mpath@0.9.0:
+  version "0.9.0"
+  resolved "https://registry.yarnpkg.com/mpath/-/mpath-0.9.0.tgz#0c122fe107846e31fc58c75b09c35514b3871904"
+  integrity sha512-ikJRQTk8hw5DEoFVxHG1Gn9T/xcjtdnOKIU1JTmGjZZlg9LST2mBLmcX3/ICIbgJydT2GOc15RnNy5mHmzfSew==
+
+mquery@6.0.0:
+  version "6.0.0"
+  resolved "https://registry.yarnpkg.com/mquery/-/mquery-6.0.0.tgz#ef6d744619ff13368c1b137d09a7adc5530fce9e"
+  integrity sha512-b2KQNsmgtkscfeDgkYMcWGn9vZI9YoXh802VDEwE6qc50zxBFQ0Oo8ROkawbPAsXCY1/Z1yp0MagqsZStPWJjw==
+
+ms@2.1.3, ms@^2.1.3:
+  version "2.1.3"
+  resolved "https://registry.yarnpkg.com/ms/-/ms-2.1.3.tgz#574c8138ce1d2b5861f0b44579dbadd60c6615b2"
+  integrity sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA==
+
+negotiator@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/negotiator/-/negotiator-1.0.0.tgz#b6c91bb47172d69f93cfd7c357bbb529019b5f6a"
+  integrity sha512-8Ofs/AUQh8MaEcrlq5xOX0CQ9ypTF5dl78mjlMNfOK08fzpgTHQRQPBxcPlEtIw0yRpws+Zo/3r+5WRby7u3Gg==
+
+nodemon@^3.1.14:
+  version "3.1.14"
+  resolved "https://registry.yarnpkg.com/nodemon/-/nodemon-3.1.14.tgz#8487ca379c515301d221ec007f27f24ecafa2b51"
+  integrity sha512-jakjZi93UtB3jHMWsXL68FXSAosbLfY0In5gtKq3niLSkrWznrVBzXFNOEMJUfc9+Ke7SHWoAZsiMkNP3vq6Jw==
+  dependencies:
+    chokidar "^3.5.2"
+    debug "^4"
+    ignore-by-default "^1.0.1"
+    minimatch "^10.2.1"
+    pstree.remy "^1.1.8"
+    semver "^7.5.3"
+    simple-update-notifier "^2.0.0"
+    supports-color "^5.5.0"
+    touch "^3.1.0"
+    undefsafe "^2.0.5"
+
+normalize-path@^3.0.0, normalize-path@~3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/normalize-path/-/normalize-path-3.0.0.tgz#0dcd69ff23a1c9b11fd0978316644a0388216a65"
+  integrity sha512-6eZs5Ls3WtCisHWp9S2GUy8dqkpGi4BVSz3GaqiE6ezub0512ESztXUwUB6C6IKbQkY2Pnb/mD4WYojCRwcwLA==
+
+object-inspect@^1.13.3, object-inspect@^1.13.4:
+  version "1.13.4"
+  resolved "https://registry.yarnpkg.com/object-inspect/-/object-inspect-1.13.4.tgz#8375265e21bc20d0fa582c22e1b13485d6e00213"
+  integrity sha512-W67iLl4J2EXEGTbfeHCffrjDfitvLANg0UlX3wFUUSTx92KXRFegMHUVgSqE+wvhAbi4WqjGg9czysTV2Epbew==
+
+on-finished@^2.4.1:
+  version "2.4.1"
+  resolved "https://registry.yarnpkg.com/on-finished/-/on-finished-2.4.1.tgz#58c8c44116e54845ad57f14ab10b03533184ac3f"
+  integrity sha512-oVlzkg3ENAhCk2zdv7IJwd/QUD4z2RxRwpkcGY8psCVcCYZNq4wYnVWALHM+brtuJjePWiYF/ClmuDr8Ch5+kg==
+  dependencies:
+    ee-first "1.1.1"
+
+once@^1.4.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/once/-/once-1.4.0.tgz#583b1aa775961d4b113ac17d9c50baef9dd76bd1"
+  integrity sha512-lNaJgI+2Q5URQBkccEKHTQOPaXdUxnZZElQTZY0MFUAuaEqe1E+Nyvgdz/aIyNi6Z9MzO5dv1H8n58/GELp3+w==
+  dependencies:
+    wrappy "1"
+
+parseurl@^1.3.3:
+  version "1.3.3"
+  resolved "https://registry.yarnpkg.com/parseurl/-/parseurl-1.3.3.tgz#9da19e7bee8d12dff0513ed5b76957793bc2e8d4"
+  integrity sha512-CiyeOxFT/JZyN5m0z9PfXw4SCBJ6Sygz1Dpl0wqjlhDEGGBP1GnsUVEL0p63hoG1fcj3fHynXi9NYO4nWOL+qQ==
+
+path-to-regexp@^8.0.0:
+  version "8.4.2"
+  resolved "https://registry.yarnpkg.com/path-to-regexp/-/path-to-regexp-8.4.2.tgz#795c420c4f7ca45c5b887366f622ee0c9852cccd"
+  integrity sha512-qRcuIdP69NPm4qbACK+aDogI5CBDMi1jKe0ry5rSQJz8JVLsC7jV8XpiJjGRLLol3N+R5ihGYcrPLTno6pAdBA==
+
+picomatch@^2.0.4, picomatch@^2.2.1:
+  version "2.3.2"
+  resolved "https://registry.yarnpkg.com/picomatch/-/picomatch-2.3.2.tgz#5a942915e26b372dc0f0e6753149a16e6b1c5601"
+  integrity sha512-V7+vQEJ06Z+c5tSye8S+nHUfI51xoXIXjHQ99cQtKUkQqqO1kO/KCJUfZXuB47h/YBlDhah2H3hdUGXn8ie0oA==
+
+proxy-addr@^2.0.7:
+  version "2.0.7"
+  resolved "https://registry.yarnpkg.com/proxy-addr/-/proxy-addr-2.0.7.tgz#f19fe69ceab311eeb94b42e70e8c2070f9ba1025"
+  integrity sha512-llQsMLSUDUPT44jdrU/O37qlnifitDP+ZwrmmZcoSKyLKvtZxpyV0n2/bD/N4tBAAZ/gJEdZU7KMraoK1+XYAg==
+  dependencies:
+    forwarded "0.2.0"
+    ipaddr.js "1.9.1"
+
+pstree.remy@^1.1.8:
+  version "1.1.8"
+  resolved "https://registry.yarnpkg.com/pstree.remy/-/pstree.remy-1.1.8.tgz#c242224f4a67c21f686839bbdb4ac282b8373d3a"
+  integrity sha512-77DZwxQmxKnu3aR542U+X8FypNzbfJ+C5XQDk3uWjWxn6151aIMGthWYRXTqT1E5oJvg+ljaa2OJi+VfvCOQ8w==
+
+punycode@^2.3.1:
+  version "2.3.1"
+  resolved "https://registry.yarnpkg.com/punycode/-/punycode-2.3.1.tgz#027422e2faec0b25e1549c3e1bd8309b9133b6e5"
+  integrity sha512-vYt7UD1U9Wg6138shLtLOvdAu+8DsC/ilFtEVHcH+wydcSpNE20AfSOduf6MkRFahL5FY7X1oU7nKVZFtfq8Fg==
+
+qs@^6.14.0, qs@^6.14.1:
+  version "6.15.1"
+  resolved "https://registry.yarnpkg.com/qs/-/qs-6.15.1.tgz#bdb55aed06bfac257a90c44a446a73fba5575c8f"
+  integrity sha512-6YHEFRL9mfgcAvql/XhwTvf5jKcOiiupt2FiJxHkiX1z4j7WL8J/jRHYLluORvc1XxB5rV20KoeK00gVJamspg==
+  dependencies:
+    side-channel "^1.1.0"
+
+range-parser@^1.2.1:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/range-parser/-/range-parser-1.2.1.tgz#3cf37023d199e1c24d1a55b84800c2f3e6468031"
+  integrity sha512-Hrgsx+orqoygnmhFbKaHE6c296J+HTAQXoxEF6gNupROmmGJRoyzfG3ccAveqCBrwr/2yxQ5BVd/GTl5agOwSg==
+
+raw-body@^3.0.1:
+  version "3.0.2"
+  resolved "https://registry.yarnpkg.com/raw-body/-/raw-body-3.0.2.tgz#3e3ada5ae5568f9095d84376fd3a49b8fb000a51"
+  integrity sha512-K5zQjDllxWkf7Z5xJdV0/B0WTNqx6vxG70zJE4N0kBs4LovmEYWJzQGxC9bS9RAKu3bgM40lrd5zoLJ12MQ5BA==
+  dependencies:
+    bytes "~3.1.2"
+    http-errors "~2.0.1"
+    iconv-lite "~0.7.0"
+    unpipe "~1.0.0"
+
+readdirp@~3.6.0:
+  version "3.6.0"
+  resolved "https://registry.yarnpkg.com/readdirp/-/readdirp-3.6.0.tgz#74a370bd857116e245b29cc97340cd431a02a6c7"
+  integrity sha512-hOS089on8RduqdbhvQ5Z37A0ESjsqz6qnRcffsMU3495FuTdqSm+7bhJ29JvIOsBDEEnan5DPu9t3To9VRlMzA==
+  dependencies:
+    picomatch "^2.2.1"
+
+router@^2.2.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/router/-/router-2.2.0.tgz#019be620b711c87641167cc79b99090f00b146ef"
+  integrity sha512-nLTrUKm2UyiL7rlhapu/Zl45FwNgkZGaCpZbIHajDYgwlJCOzLSk+cIPAnsEqV955GjILJnKbdQC1nVPz+gAYQ==
+  dependencies:
+    debug "^4.4.0"
+    depd "^2.0.0"
+    is-promise "^4.0.0"
+    parseurl "^1.3.3"
+    path-to-regexp "^8.0.0"
+
+"safer-buffer@>= 2.1.2 < 3.0.0":
+  version "2.1.2"
+  resolved "https://registry.yarnpkg.com/safer-buffer/-/safer-buffer-2.1.2.tgz#44fa161b0187b9549dd84bb91802f9bd8385cd6a"
+  integrity sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==
+
+semver@^7.5.3:
+  version "7.7.4"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-7.7.4.tgz#28464e36060e991fa7a11d0279d2d3f3b57a7e8a"
+  integrity sha512-vFKC2IEtQnVhpT78h1Yp8wzwrf8CM+MzKMHGJZfBtzhZNycRFnXsHk6E5TxIkkMsgNS7mdX3AGB7x2QM2di4lA==
+
+send@^1.1.0, send@^1.2.0:
+  version "1.2.1"
+  resolved "https://registry.yarnpkg.com/send/-/send-1.2.1.tgz#9eab743b874f3550f40a26867bf286ad60d3f3ed"
+  integrity sha512-1gnZf7DFcoIcajTjTwjwuDjzuz4PPcY2StKPlsGAQ1+YH20IRVrBaXSWmdjowTJ6u8Rc01PoYOGHXfP1mYcZNQ==
+  dependencies:
+    debug "^4.4.3"
+    encodeurl "^2.0.0"
+    escape-html "^1.0.3"
+    etag "^1.8.1"
+    fresh "^2.0.0"
+    http-errors "^2.0.1"
+    mime-types "^3.0.2"
+    ms "^2.1.3"
+    on-finished "^2.4.1"
+    range-parser "^1.2.1"
+    statuses "^2.0.2"
+
+serve-static@^2.2.0:
+  version "2.2.1"
+  resolved "https://registry.yarnpkg.com/serve-static/-/serve-static-2.2.1.tgz#7f186a4a4e5f5b663ad7a4294ff1bf37cf0e98a9"
+  integrity sha512-xRXBn0pPqQTVQiC8wyQrKs2MOlX24zQ0POGaj0kultvoOCstBQM5yvOhAVSUwOMjQtTvsPWoNCHfPGwaaQJhTw==
+  dependencies:
+    encodeurl "^2.0.0"
+    escape-html "^1.0.3"
+    parseurl "^1.3.3"
+    send "^1.2.0"
+
+setprototypeof@~1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/setprototypeof/-/setprototypeof-1.2.0.tgz#66c9a24a73f9fc28cbe66b09fed3d33dcaf1b424"
+  integrity sha512-E5LDX7Wrp85Kil5bhZv46j8jOeboKq5JMmYM3gVGdGH8xFpPWXUMsNrlODCrkoxMEeNi/XZIwuRvY4XNwYMJpw==
+
+side-channel-list@^1.0.0:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/side-channel-list/-/side-channel-list-1.0.1.tgz#c2e0b5a14a540aebee3bbc6c3f8666cc9b509127"
+  integrity sha512-mjn/0bi/oUURjc5Xl7IaWi/OJJJumuoJFQJfDDyO46+hBWsfaVM65TBHq2eoZBhzl9EchxOijpkbRC8SVBQU0w==
+  dependencies:
+    es-errors "^1.3.0"
+    object-inspect "^1.13.4"
+
+side-channel-map@^1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/side-channel-map/-/side-channel-map-1.0.1.tgz#d6bb6b37902c6fef5174e5f533fab4c732a26f42"
+  integrity sha512-VCjCNfgMsby3tTdo02nbjtM/ewra6jPHmpThenkTYh8pG9ucZ/1P8So4u4FGBek/BjpOVsDCMoLA/iuBKIFXRA==
+  dependencies:
+    call-bound "^1.0.2"
+    es-errors "^1.3.0"
+    get-intrinsic "^1.2.5"
+    object-inspect "^1.13.3"
+
+side-channel-weakmap@^1.0.2:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/side-channel-weakmap/-/side-channel-weakmap-1.0.2.tgz#11dda19d5368e40ce9ec2bdc1fb0ecbc0790ecea"
+  integrity sha512-WPS/HvHQTYnHisLo9McqBHOJk2FkHO/tlpvldyrnem4aeQp4hai3gythswg6p01oSoTl58rcpiFAjF2br2Ak2A==
+  dependencies:
+    call-bound "^1.0.2"
+    es-errors "^1.3.0"
+    get-intrinsic "^1.2.5"
+    object-inspect "^1.13.3"
+    side-channel-map "^1.0.1"
+
+side-channel@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.yarnpkg.com/side-channel/-/side-channel-1.1.0.tgz#c3fcff9c4da932784873335ec9765fa94ff66bc9"
+  integrity sha512-ZX99e6tRweoUXqR+VBrslhda51Nh5MTQwou5tnUDgbtyM0dBgmhEDtWGP/xbKn6hqfPRHujUNwz5fy/wbbhnpw==
+  dependencies:
+    es-errors "^1.3.0"
+    object-inspect "^1.13.3"
+    side-channel-list "^1.0.0"
+    side-channel-map "^1.0.1"
+    side-channel-weakmap "^1.0.2"
+
+sift@17.1.3:
+  version "17.1.3"
+  resolved "https://registry.yarnpkg.com/sift/-/sift-17.1.3.tgz#9d2000d4d41586880b0079b5183d839c7a142bf7"
+  integrity sha512-Rtlj66/b0ICeFzYTuNvX/EF1igRbbnGSvEyT79McoZa/DeGhMyC5pWKOEsZKnpkqtSeovd5FL/bjHWC3CIIvCQ==
+
+simple-update-notifier@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/simple-update-notifier/-/simple-update-notifier-2.0.0.tgz#d70b92bdab7d6d90dfd73931195a30b6e3d7cebb"
+  integrity sha512-a2B9Y0KlNXl9u/vsW6sTIu9vGEpfKu2wRV6l1H3XEas/0gUIzGzBoP/IouTcUQbm9JWZLH3COxyn03TYlFax6w==
+  dependencies:
+    semver "^7.5.3"
+
+sparse-bitfield@^3.0.3:
+  version "3.0.3"
+  resolved "https://registry.yarnpkg.com/sparse-bitfield/-/sparse-bitfield-3.0.3.tgz#ff4ae6e68656056ba4b3e792ab3334d38273ca11"
+  integrity sha512-kvzhi7vqKTfkh0PZU+2D2PIllw2ymqJKujUcyPMd9Y75Nv4nPbGJZXNhxsgdQab2BmlDct1YnfQCguEvHr7VsQ==
+  dependencies:
+    memory-pager "^1.0.2"
+
+statuses@^2.0.1, statuses@^2.0.2, statuses@~2.0.2:
+  version "2.0.2"
+  resolved "https://registry.yarnpkg.com/statuses/-/statuses-2.0.2.tgz#8f75eecef765b5e1cfcdc080da59409ed424e382"
+  integrity sha512-DvEy55V3DB7uknRo+4iOGT5fP1slR8wQohVdknigZPMpMstaKJQWhwiYBACJE3Ul2pTnATihhBYnRhZQHGBiRw==
+
+supports-color@^5.5.0:
+  version "5.5.0"
+  resolved "https://registry.yarnpkg.com/supports-color/-/supports-color-5.5.0.tgz#e2e69a44ac8772f78a1ec0b35b689df6530efc8f"
+  integrity sha512-QjVjwdXIt408MIiAqCX4oUKsgU2EqAGzs2Ppkm4aQYbjm+ZEWEcW4SfFNTr4uMNZma0ey4f5lgLrkB0aX0QMow==
+  dependencies:
+    has-flag "^3.0.0"
+
+to-regex-range@^5.0.1:
+  version "5.0.1"
+  resolved "https://registry.yarnpkg.com/to-regex-range/-/to-regex-range-5.0.1.tgz#1648c44aae7c8d988a326018ed72f5b4dd0392e4"
+  integrity sha512-65P7iz6X5yEr1cwcgvQxbbIw7Uk3gOy5dIdtZ4rDveLqhrdJP+Li/Hx6tyK0NEb+2GCyneCMJiGqrADCSNk8sQ==
+  dependencies:
+    is-number "^7.0.0"
+
+toidentifier@~1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/toidentifier/-/toidentifier-1.0.1.tgz#3be34321a88a820ed1bd80dfaa33e479fbb8dd35"
+  integrity sha512-o5sSPKEkg/DIQNmH43V0/uerLrpzVedkUh8tGNvaeXpfpuwjKenlSox/2O/BTlZUtEe+JG7s5YhEz608PlAHRA==
+
+touch@^3.1.0:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/touch/-/touch-3.1.1.tgz#097a23d7b161476435e5c1344a95c0f75b4a5694"
+  integrity sha512-r0eojU4bI8MnHr8c5bNo7lJDdI2qXlWWJk6a9EAFG7vbhTjElYhBVS3/miuE0uOuoLdb8Mc/rVfsmm6eo5o9GA==
+
+tr46@^5.1.0:
+  version "5.1.1"
+  resolved "https://registry.yarnpkg.com/tr46/-/tr46-5.1.1.tgz#96ae867cddb8fdb64a49cc3059a8d428bcf238ca"
+  integrity sha512-hdF5ZgjTqgAntKkklYw0R03MG2x/bSzTtkxmIRw/sTNV8YXsCJ1tfLAX23lhxhHJlEf3CRCOCGGWw3vI3GaSPw==
+  dependencies:
+    punycode "^2.3.1"
+
+ts-node@^10.9.2:
+  version "10.9.2"
+  resolved "https://registry.yarnpkg.com/ts-node/-/ts-node-10.9.2.tgz#70f021c9e185bccdca820e26dc413805c101c71f"
+  integrity sha512-f0FFpIdcHgn8zcPSbf1dRevwt047YMnaiJM3u2w2RewrB+fob/zePZcrOyQoLMMO7aBIddLcQIEK5dYjkLnGrQ==
+  dependencies:
+    "@cspotcode/source-map-support" "^0.8.0"
+    "@tsconfig/node10" "^1.0.7"
+    "@tsconfig/node12" "^1.0.7"
+    "@tsconfig/node14" "^1.0.0"
+    "@tsconfig/node16" "^1.0.2"
+    acorn "^8.4.1"
+    acorn-walk "^8.1.1"
+    arg "^4.1.0"
+    create-require "^1.1.0"
+    diff "^4.0.1"
+    make-error "^1.1.1"
+    v8-compile-cache-lib "^3.0.1"
+    yn "3.1.1"
+
+type-is@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/type-is/-/type-is-2.0.1.tgz#64f6cf03f92fce4015c2b224793f6bdd4b068c97"
+  integrity sha512-OZs6gsjF4vMp32qrCbiVSkrFmXtG/AZhY3t0iAMrMBiAZyV9oALtXO8hsrHbMXF9x6L3grlFuwW2oAz7cav+Gw==
+  dependencies:
+    content-type "^1.0.5"
+    media-typer "^1.1.0"
+    mime-types "^3.0.0"
+
+typescript@^6.0.2:
+  version "6.0.2"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-6.0.2.tgz#0b1bfb15f68c64b97032f3d78abbf98bdbba501f"
+  integrity sha512-bGdAIrZ0wiGDo5l8c++HWtbaNCWTS4UTv7RaTH/ThVIgjkveJt83m74bBHMJkuCbslY8ixgLBVZJIOiQlQTjfQ==
+
+undefsafe@^2.0.5:
+  version "2.0.5"
+  resolved "https://registry.yarnpkg.com/undefsafe/-/undefsafe-2.0.5.tgz#38733b9327bdcd226db889fb723a6efd162e6e2c"
+  integrity sha512-WxONCrssBM8TSPRqN5EmsjVrsv4A8X12J4ArBiiayv3DyyG3ZlIg6yysuuSYdZsVz3TKcTg2fd//Ujd4CHV1iA==
+
+undici-types@~7.19.0:
+  version "7.19.2"
+  resolved "https://registry.yarnpkg.com/undici-types/-/undici-types-7.19.2.tgz#1b67fc26d0f157a0cba3a58a5b5c1e2276b8ba2a"
+  integrity sha512-qYVnV5OEm2AW8cJMCpdV20CDyaN3g0AjDlOGf1OW4iaDEx8MwdtChUp4zu4H0VP3nDRF/8RKWH+IPp9uW0YGZg==
+
+unpipe@~1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/unpipe/-/unpipe-1.0.0.tgz#b2bf4ee8514aae6165b4817829d21b2ef49904ec"
+  integrity sha512-pjy2bYhSsufwWlKwPc+l3cN7+wuJlK6uz0YdJEOlQDbl6jo/YlPi4mb8agUkVC8BF7V8NuzeyPNqRksA3hztKQ==
+
+v8-compile-cache-lib@^3.0.1:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/v8-compile-cache-lib/-/v8-compile-cache-lib-3.0.1.tgz#6336e8d71965cb3d35a1bbb7868445a7c05264bf"
+  integrity sha512-wa7YjyUGfNZngI/vtK0UHAN+lgDCxBPCylVXGp0zu59Fz5aiGtNXaq3DhIov063MorB+VfufLh3JlF2KdTK3xg==
+
+vary@^1.1.2:
+  version "1.1.2"
+  resolved "https://registry.yarnpkg.com/vary/-/vary-1.1.2.tgz#2299f02c6ded30d4a5961b0b9f74524a18f634fc"
+  integrity sha512-BNGbWLfd0eUPabhkXUVm0j8uuvREyTh5ovRa/dyow/BqAbZJyC+5fU+IzQOzmAKzYqYRAISoRhdQr3eIZ/PXqg==
+
+webidl-conversions@^7.0.0:
+  version "7.0.0"
+  resolved "https://registry.yarnpkg.com/webidl-conversions/-/webidl-conversions-7.0.0.tgz#256b4e1882be7debbf01d05f0aa2039778ea080a"
+  integrity sha512-VwddBukDzu71offAQR975unBIGqfKZpM+8ZX6ySk8nYhVoo5CYaZyzt3YBvYtRtO+aoGlqxPg/B87NGVZ/fu6g==
+
+whatwg-url@^14.1.0:
+  version "14.2.0"
+  resolved "https://registry.yarnpkg.com/whatwg-url/-/whatwg-url-14.2.0.tgz#4ee02d5d725155dae004f6ae95c73e7ef5d95663"
+  integrity sha512-De72GdQZzNTUBBChsXueQUnPKDkg/5A5zp7pFDuQAj5UFoENpiACU0wlCvzpAGnTkj++ihpKwKyYewn/XNUbKw==
+  dependencies:
+    tr46 "^5.1.0"
+    webidl-conversions "^7.0.0"
+
+wrappy@1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/wrappy/-/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f"
+  integrity sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==
+
+yn@3.1.1:
+  version "3.1.1"
+  resolved "https://registry.yarnpkg.com/yn/-/yn-3.1.1.tgz#1e87401a09d767c1d5eab26a6e4c185182d2eb50"
+  integrity sha512-Ux4ygGWsu2c7isFWe8Yu1YluJmqVhxqK2cLXNQA5AcC3QfbGNpM7fu0Y8b/z16pXLnFxZYvWhd3fhBY9DLmC6Q==
diff --git a/src/problem6/README.md b/src/problem6/README.md
new file mode 100644
index 0000000000..e1b815f282
--- /dev/null
+++ b/src/problem6/README.md
@@ -0,0 +1,348 @@
+# Live Scoreboard API Module Specification
+
+## 1. Purpose
+
+This document specifies a backend module that powers a live top-10 scoreboard.
+It is intended for a backend engineering team to implement in an API service.
+
+The module must:
+
+- Persist and update user scores.
+- Expose the top 10 scores for display.
+- Push live scoreboard updates to connected clients.
+- Prevent unauthorized or malicious score inflation.
+
+## 2. Scope
+
+### In Scope
+
+- Score update endpoint called when a user completes a valid action.
+- Real-time publication of scoreboard changes.
+- Top-10 query endpoint.
+- Authentication, authorization, and anti-abuse controls.
+- Auditability of score mutations.
+
+### Out of Scope
+
+- Definition of the user action itself.
+- Frontend UI behavior details.
+- User profile management.
+
+## 3. Functional Requirements Mapping
+
+1. Show top 10 user scores.
+2. Support live scoreboard updates.
+3. Completing an action increases score.
+4. Frontend sends API request to update score after action completion.
+5. Reject malicious or unauthorized score updates.
+
+## 4. High-Level Architecture
+
+Components:
+
+- API Service: validates requests, enforces security, updates score state.
+- Score Store: persistent database for user scores and score events.
+- Realtime Gateway: WebSocket or Server-Sent Events (SSE) broadcaster.
+- Cache/Leaderboard View: optional fast read model for top-10 queries.
+- Message Bus (optional): decouples write path from realtime fan-out at scale.
+
+Recommended pattern:
+
+- Command path: client -> API -> DB transaction -> publish score-changed event.
+- Query path: client -> API -> top-10 read model (cache or indexed query).
+
+## 5. Data Model
+
+### 5.1 Tables / Collections
+
+`users`
+
+- `id` (UUID, PK)
+- `status` (active, suspended)
+
+`scores`
+
+- `user_id` (UUID, PK/FK to users)
+- `score` (bigint, default 0)
+- `updated_at` (timestamp)
+- index: `(score DESC, updated_at ASC)` for leaderboard retrieval
+
+`score_events` (append-only audit log)
+
+- `id` (UUID, PK)
+- `user_id` (UUID)
+- `action_id` (string/UUID, unique for idempotency)
+- `score_delta` (int, positive)
+- `source` (web, mobile, internal)
+- `created_at` (timestamp)
+- unique index: `(action_id)`
+
+### 5.2 Notes
+
+- Use bigint for score to avoid overflow.
+- Maintain immutable event log for fraud analysis and replay.
+
+## 6. API Contract
+
+Base path: `/api/v1`
+
+### 6.1 Submit Score Update
+
+`POST /scores/actions/complete`
+
+Purpose:
+
+- Register completion of a user action and increase score.
+
+Authentication:
+
+- Required: Bearer access token (user identity).
+
+Authorization:
+
+- User can only mutate own score unless service-account scope is present.
+
+Request body:
+
+```json
+{
+  "actionId": "a4f7ad86-7d0d-4a65-a488-76e5d0e5f2c9",
+  "scoreDelta": 10,
+  "actionType": "MATCH_WIN",
+  "actionTimestamp": "2026-04-12T10:30:00Z",
+  "nonce": "d0f9...",
+  "signature": "base64-hmac-or-jws"
+}
+```
+
+Validation rules:
+
+- `actionId` required and unique (idempotency key).
+- `scoreDelta` must match server-side policy for `actionType`; never trust client-provided raw points without verification.
+- `actionTimestamp` must be within allowed clock skew window (for replay resistance).
+- Signature must be valid for configured secret/public key.
+- Reject suspended users.
+
+Responses:
+
+- `200 OK`: score accepted and applied (or idempotent replay with same result).
+- `202 Accepted`: optional async processing mode.
+- `400 Bad Request`: schema/validation failure.
+- `401 Unauthorized`: missing/invalid auth.
+- `403 Forbidden`: unauthorized user or invalid signature scope.
+- `409 Conflict`: duplicated `actionId` with inconsistent payload.
+- `429 Too Many Requests`: rate-limited.
+
+Response body:
+
+```json
+{
+  "userId": "3cb7f889-f53c-42ad-946f-772f3e0f82d4",
+  "newScore": 2570,
+  "appliedDelta": 10,
+  "leaderboardRank": 4,
+  "processedAt": "2026-04-12T10:30:01Z"
+}
+```
+
+### 6.2 Get Top 10 Leaderboard
+
+`GET /leaderboard?limit=10`
+
+Purpose:
+
+- Fetch current top-N users, default 10, max 100.
+
+Response:
+
+```json
+{
+  "generatedAt": "2026-04-12T10:30:01Z",
+  "items": [
+    {
+      "rank": 1,
+      "userId": "u1",
+      "score": 3200
+    }
+  ]
+}
+```
+
+### 6.3 Realtime Subscription
+
+Option A: `GET /leaderboard/stream` (SSE)
+
+Option B: `WS /realtime` with channel `leaderboard.top10`
+
+Event payload:
+
+```json
+{
+  "type": "LEADERBOARD_UPDATED",
+  "version": 1842,
+  "generatedAt": "2026-04-12T10:30:01Z",
+  "items": [
+    { "rank": 1, "userId": "u1", "score": 3200 },
+    { "rank": 2, "userId": "u2", "score": 3110 }
+  ]
+}
+```
+
+Guarantees:
+
+- At-least-once event delivery for realtime channel.
+- Clients should handle duplicates by `version`.
+
+## 7. Security and Abuse Prevention
+
+Mandatory controls:
+
+- Strong authentication (JWT or equivalent).
+- Token audience/scope checks.
+- Request signing for action completion payloads.
+- Idempotency via `actionId` unique constraint.
+- Per-user and per-IP rate limits.
+- Server-side score policy enforcement (ignore untrusted client score math).
+- Replay protection with nonce + timestamp + short validity window.
+- Fraud rules:
+  - detect impossible action frequencies,
+  - detect abnormal score velocity,
+  - quarantine suspicious updates for review.
+
+Operational controls:
+
+- Full audit log (`score_events`) with immutable storage policy.
+- Alerting on threshold anomalies and signature validation failures.
+- WAF and bot mitigation in front of API.
+
+## 8. Consistency and Concurrency
+
+Score update transaction must be atomic:
+
+1. Validate auth + request integrity.
+2. Check idempotency key.
+3. Insert score event.
+4. Update user score (`score = score + delta`).
+5. Commit transaction.
+6. Publish leaderboard update event.
+
+Concurrency requirements:
+
+- No lost updates under concurrent requests.
+- Use DB row-level locking or atomic increment statements.
+
+## 9. Performance and Scalability Targets
+
+- Read endpoint p95 latency: < 100 ms.
+- Score update p95 latency: < 200 ms (sync mode).
+- Realtime fan-out delay target: < 1 second from commit.
+- Throughput target to define with product traffic forecast (initially at least 1k updates/sec burst-capable).
+
+Implementation guidance:
+
+- Cache top-10 snapshot with short TTL (for example 1-3 seconds) or event-driven invalidation.
+- Use pagination-capable leaderboard API to extend beyond top 10 in the future.
+
+## 10. Observability
+
+Metrics:
+
+- `score_update_requests_total` (by status)
+- `score_update_rejected_total` (by reason)
+- `score_update_latency_ms`
+- `leaderboard_query_latency_ms`
+- `realtime_delivery_lag_ms`
+
+Logs and tracing:
+
+- Correlate every update request with `requestId`, `userId`, `actionId`.
+- Distributed trace across API, DB, and realtime publisher.
+
+## 11. Error Handling
+
+Standard error format:
+
+```json
+{
+  "error": {
+    "code": "INVALID_SIGNATURE",
+    "message": "Request signature validation failed",
+    "details": {}
+  }
+}
+```
+
+Error codes (minimum):
+
+- `INVALID_TOKEN`
+- `FORBIDDEN`
+- `INVALID_PAYLOAD`
+- `DUPLICATE_ACTION_ID`
+- `RATE_LIMITED`
+- `INVALID_SIGNATURE`
+- `REPLAY_DETECTED`
+
+## 12. Execution Flow Diagram
+
+```mermaid
+sequenceDiagram
+		autonumber
+		participant U as User Client
+		participant FE as Website Frontend
+		participant API as API Service
+		participant DB as Score DB
+		participant RT as Realtime Gateway
+		participant V as Viewing Clients
+
+		U->>FE: Complete action
+		FE->>API: POST /scores/actions/complete (token, actionId, signature)
+		API->>API: Authenticate + authorize + validate + anti-replay
+		API->>DB: Transaction: insert score_event, increment score
+		DB-->>API: Commit success + new score
+		API->>RT: Publish LEADERBOARD_UPDATED
+		RT-->>V: Push top10 update (SSE/WS)
+		API-->>FE: 200 OK (newScore, rank)
+```
+
+## 13. Test Strategy (Implementation Acceptance)
+
+Unit tests:
+
+- Score policy validation by action type.
+- Signature and nonce validation.
+- Idempotency handling.
+
+Integration tests:
+
+- End-to-end score update transaction with concurrent writes.
+- Duplicate `actionId` replay behavior.
+- Unauthorized and malformed requests.
+
+Realtime tests:
+
+- Leaderboard event emitted after successful commit.
+- Clients receive deduplicated ordered updates using `version`.
+
+Security tests:
+
+- Token tampering, signature tampering, replay attempts, and rate-limit bypass attempts.
+
+## 14. Additional Comments and Improvement Opportunities
+
+1. Prefer deriving `scoreDelta` on the server from `actionType` and authoritative business rules; treat client values as hints only.
+2. Consider an event-driven architecture (event bus + consumer) if write throughput and fan-out grow significantly.
+3. Add a risk engine that can soft-block suspicious users instead of hard-failing all updates.
+4. Introduce seasonal leaderboard partitions to keep indexes compact and queries fast.
+5. Define clear privacy policy for exposing user identity on leaderboard (for example display name aliasing).
+6. Add dead-letter handling for failed realtime publishes to avoid silent data staleness.
+7. Establish SLOs and alert thresholds early so production regressions are quickly detected.
+
+## 15. Delivery Checklist for Backend Team
+
+- Implement endpoints and auth middleware.
+- Enforce idempotency and anti-replay guarantees.
+- Add DB schema + indexes + migration scripts.
+- Implement realtime broadcaster and client subscription contract.
+- Add observability dashboards and security alerts.
+- Provide OpenAPI spec and postman/contract tests.
+- Validate load and concurrency against targets before release.