[Prod] Add OpenTelemetry integration #76
Description
Description
Observability support
Acceptance Criteria
- Integrate OpenTelemetry tracing
- Add distributed trace correlation
- Implement metrics export via OTLP
- Support multiple telemetry backends
- Add trace sampling configuration
Implementation Hints
- Use OpenTelemetry Go SDK
- Implement trace context propagation
- Add instrumentation for key operations
Dependencies
Performance metrics, Structured logging