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3 Commits

Author SHA1 Message Date
Lukas
7ec80fdeec refactor(logging): replace structlog with stdlib logging compat layer 
- Remove structlog dependency from backend/pyproject.toml
- Add app.utils.logging_compat shim for keyword-arg logging API
- Add app.utils.json_formatter for JSON log output with extra fields
- Update all backend modules to use logging_compat.get_logger()
- Update docstrings in log_sanitizer.py and json_formatter.py
- Update test comment in test_async_utils.py
- Record 406 failing tests in Docs/Tasks.md for tracking
 2026-05-10 13:37:54 +02:00
Lukas
eb339efcfd Add Kubernetes liveness/readiness probes and middleware order validation 
- Split /health into /health/live (liveness) and /health/ready (readiness)
  following Kubernetes conventions. Combined /health retained for backward
  compatibility with existing Docker HEALTHCHECK definitions.
- Add ReadyCheck and ReadyResponse models for structured readiness output.
- Add _assert_middleware_order() startup check enforcing:
  RateLimit → Csrf → CorrelationId middleware chain.
- Register CorrelationIdMiddleware, CsrfMiddleware, RateLimitMiddleware
  in create_app() with documented required order (reverse of processing).
- Add correlation.py, csrf.py, rate_limit.py middleware modules.
- Add health probe tests in test_health_probes.py.
- Update test_main.py with middleware order assertion tests.
- Update frontend useFetchData hook tests.
- Docs: update Deployment.md with Kubernetes probe config examples.
 2026-05-04 02:42:09 +02:00
Lukas
3d1a6f5538 Implement frontend and backend observability alignment 
Align frontend and backend error observability with correlation IDs and
structured telemetry for distributed tracing across systems.

Backend changes:
- Add CorrelationIdMiddleware to generate/extract correlation IDs
- Include correlation_id in all ErrorResponse objects
- Store correlation ID in structlog contextvars for automatic inclusion in logs
- Add correlation ID to response headers (X-Correlation-ID)

Frontend changes:
- API client automatically generates session-scoped UUID4 and includes
  X-Correlation-ID header in all requests
- Extract correlation ID from API error responses
- Update error handlers to use telemetry with correlation IDs
- Add telemetry logging to ErrorBoundary, PageErrorBoundary, SectionErrorBoundary
- Implement redaction utilities for privacy-safe logging of sensitive data

Documentation:
- Add observability guidelines to Web-Development.md
  * Correlation ID usage patterns
  * Privacy & security best practices
  * Telemetry event structure
  * Redaction utilities for sensitive data
- Add distributed tracing architecture section to Architecture.md
  * Correlation ID flow across frontend/backend
  * Example troubleshooting scenario
  * Implementation details for future enhancements

Testing:
- Add comprehensive tests for correlation middleware
- Update error boundary tests to verify telemetry integration
- Verify TypeScript and ESLint pass with no warnings

Fixes: Issue #40 - Frontend and backend observability are not aligned

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
 2026-04-30 18:32:19 +02:00