chore(cloudflare-webhook-agent-ingest): Use client instead of pool

[pandemicsyn]

Switch to pg client per use.

[pandemicsyn]

I don't think this would really cause issues, but i definitely didn't have this singleton in my spec - i think the robot snuck this one past me at some point.

[kilo-code-bot]

Code Review Summary

Status: 3 Issues Found | Recommendation: Address before merge

Overview

Severity	Count
CRITICAL	0
WARNING	2
SUGGESTION	1

Fix these issues in Kilo Cloud

Issue Details (click to expand)

WARNING

File	Line	Issue
cloudflare-webhook-agent-ingest/src/db/node-postgres.ts	19	Switching from Pool to per-call Client drops prior timeout/limit protections (max, connection timeout, statement timeout).
cloudflare-webhook-agent-ingest/src/db/node-postgres.ts	56	await client.end() in finally can override the original query/transaction error.

SUGGESTION

File	Line	Issue
cloudflare-webhook-agent-ingest/src/services/token-minting-service.ts	30	Removing the singleton may increase per-invocation DB/secret initialization if called multiple times.

Files Reviewed (3 files)

• cloudflare-webhook-agent-ingest/src/db/node-postgres.ts - 2 issues
• cloudflare-webhook-agent-ingest/src/services/profile-resolution-service.ts - 0 issues
• cloudflare-webhook-agent-ingest/src/services/token-minting-service.ts - 1 issue