- Add health checks: api (GET /health), worker, heavy-runtime, nginx
- Add resource limits (deploy.resources) for all 6 services
- Add heavy-runtime service (Rust AI Worker)
- Add INTERNAL_API_KEY + CREDENTIAL_ENCRYPTION_KEY env vars
- nginx health check via GET /health
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>