Health check endpoint for monitoring and orchestration

Used by: - Kubernetes liveness probes (is the service running?) - Kubernetes readiness probes (can the service handle traffic?) - Monitoring systems (Prometheus, Datadog, etc.) - Load balancers (health checks) # Health Criteria The service is considered **healthy** when: - PostgreSQL database is reachable (`SELECT 1` succeeds) - Redis cache is reachable (PING succeeds) # Response Codes - **200 OK**: Service is healthy - **503 Service Unavailable**: Service is unhealthy

curl -X GET "https://example.com/health"

{  "database": true,  "redis": true,  "status": "string",  "timestamp": "string",  "uptime": 0,  "version": "string"}

{  "database": true,  "redis": true,  "status": "string",  "timestamp": "string",  "uptime": 0,  "version": "string"}