Ensure the api-backend can connect to PostgreSQL and schema is applied.

Acceptance Criteria

• api-backend pod logs show successful DB connection
• api-backend responds to a DB-backed endpoint or migration check
• No CrashLoopBackOff due to DB connection

Implementation Details

• Confirm DB_HOST=postgresql.cloudtolocalllm.svc.cluster.local and credentials from api-secrets
• kubectl port-forward to DB or use psql client in a debug pod to verify connectivity
• Run services/api-backend/database/migrate-pg.js if needed

Dependencies

• Helm PostgreSQL deployed and Ready
• api-secrets contains db-password matching Helm secret

Effort: S (2–4 hours)
Priority: P0

Testing & Validation

• kubectl logs deployment/api-backend -n cloudtolocalllm
• curl API endpoints that hit DB
• psql auth with secret values

Related to #96 (Phase 1 Epic)