Serverless Telemetry Sync Postgres to Redis Router

Write a Node.js AWS Lambda serverless function triggered by a PostgreSQL database logical replication stream (via Supabase Webhooks or pg_recvlogical).

FUNCTIONAL FLOW:
1. Parse incoming write stream event (INSERT, UPDATE, DELETE) payloads.
2. Sanitize and structure metrics into telemetry objects.
3. Write clean key-value caches to Redis using EXPIRE rules (default 24 hours).
4. Run telemetry validator checking write transaction confirmation and return JSON feedback.