Security fix: Move Prometheus metrics endpoint from main HTTP port to
dedicated port 9090 to prevent external exposure of metrics data.
Changes:
- Use prometheus_client.start_http_server() for dedicated metrics server
- Remove /metrics route from main application routes
- Metrics now only accessible on port 9090 (configurable via METRICS_PORT)
- Main application port no longer serves /metrics endpoint
This follows security best practice of isolating monitoring endpoints
from application traffic.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
- Add Prometheus metrics for HTTP, MCP tools, Nextcloud API, OAuth, vector sync, and DB operations
- Add OpenTelemetry distributed tracing with OTLP export
- Add structured JSON logging with trace context correlation
- Add ObservabilityMiddleware for automatic HTTP instrumentation
- Add app_name attribute to all client classes for per-app metrics
- Add configuration for metrics, tracing, and logging via environment variables
- Add documentation in docs/observability.md
- Fix graceful degradation when tracing is disabled (default state)
- Fix uvicorn logging configuration to use observability formatters
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
Chris Coutinho