0dbac480ae
- Add OpenTelemetry SDK, OTLP exporter, Prometheus integration - Implement connection tracking with active/total/disconnection metrics - Add health endpoint with uptime and connection counts - Integrate tracing spans for socket events and engine messages - Add metrics collection for event handling duration - Update health endpoint to include live runtime state - Add graceful telemetry shutdown in main function - Implement engine session active metrics tracking - Add namespace-specific attributes to connection metrics - Introduce message edit history retrieval endpoint - Add scheduled message CRUD operations and dispatcher - Update Socket.IO event registration with observability - Refactor component update to remove dead code allowance - Add comprehensive environment variables documentation - Implement detailed development guidelines in AGENTS.md