feature: update function to use admin server with headers

[Anmol1696]

Summary

Enable send-email-link function to work with jobs infrastructure via header-based GraphQL routing.

Changes

• Fix schema field name mismatch in API middleware (schemaNamesFromExt → apiExtensions)
• Fix GraphQL response structure for apiByDatabaseIdAndName query
• Add header-based routing support (X-Database-Id, X-Api-Name, etc.)
• Strip subdomain for localhost domains (generates http://localhost:3000 not http://app.localhost:3000)
• Add SMTP email support option
• Update docker-compose with admin/public server split
• Replace console.log with structured logger

Testing

• Existing e2e tests pass
• Added tests for forgot_password and email_verification email types
• Manual docker-compose verification

Breaking Changes

• simple-email function removed from docker-compose (use send-email-link instead)
• Network renamed to constructive-tests-net
• Admin server port changed to 3101

[Copilot]

Pull request overview

This PR updates the send-email-link Knative function to support header-based routing for GraphQL requests to an admin server with API_IS_PUBLIC=false. The changes enable multi-tenant GraphQL access using custom headers (X-Database-Id, X-Meta-Schema, X-Api-Name, X-Schemata) instead of relying on hostname-based routing.

Changes:

• Enhanced createGraphQLClient function to support additional header-based routing options for internal admin server communication
• Updated Docker Compose configuration to use the new admin server setup with API_IS_PUBLIC=false
• Replaced outdated PostgreSQL image with newer version (ghcr.io/constructive-io/docker/postgres-plus:17)
• Removed simple-email function references from documentation and Docker Compose in favor of send-email-link

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
jobs/README.md	Updated documentation to reflect send-email-link function usage with admin server header-based routing, removed simple-email references
functions/send-email-link/src/index.ts	Refactored createGraphQLClient to accept an options object with header-based routing parameters (databaseId, useMetaSchema, apiName, schemata)
docker-compose.yml	Updated PostgreSQL image from pyramation/pgvector:13.3-alpine to ghcr.io/constructive-io/docker/postgres-plus:17
docker-compose.jobs.yml	Renamed service from constructive-server to constructive-admin-server, added API_IS_PUBLIC=false, removed simple-email service references

Comments suppressed due to low confidence (1)

jobs/README.md:1

• Corrected malformed heading. There's an extra 'n' character before the '#' symbol.

n# Jobs (Knative)

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[Copilot]

Pull request overview

Copilot reviewed 7 out of 8 changed files in this pull request and generated 9 comments.

Comments suppressed due to low confidence (1)

jobs/README.md:2

• The line marker '----' (line 0 in diff) should be '---' (three hyphens) to match standard Markdown horizontal rule syntax used elsewhere in the document.

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[Anmol1696]

This was potentially the bug that lead to API not found html error.