feat: implement structured logging with correlation IDs (#939) - #1029
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Smartdevs17 merged 4 commits intoAug 27, 2026
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) - Add StructuredLogger class to ml-service/main.py with JSON-formatted output that auto-injects the active correlation ID - Add ContextVar-based correlation ID storage for async request isolation - Add ASGI middleware that reads/generates X-Correlation-ID header and propagates it through every log entry in the request lifecycle - Add ml-service/tests/test_structured_logging.py with 20+ pytest cases covering the logger, middleware, and end-to-end header propagation Technical scope: backend/services/shared/logging.ts, ml-service/main.py
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The existing lock file had react-native@0.79.7 while package.json requires 0.85.2, plus several other mismatched/missing packages (metro, hermes, ws, etc). Regenerated with npm install --legacy-peer-deps --package-lock-only so that npm ci succeeds in CI.
Prettier (TypeScript Lint & Format): - src/screens/CancellationFlowScreen.tsx: remove duplicate component definition fragment that caused a missing-brace parse error - src/screens/SupportDashboardScreen.tsx: add missing closing </Card> and ) for renderMetric arrow function - src/types/fraud.ts: remove dangling "| device-mismatch" line that was a leftover from a bad merge TypeScript Type Check (contracts:codegen:check): - Regenerate src/contracts/types/ with ethers-v5 typechain target so the committed output matches what npm run contracts:codegen produces Rust Format Check: - contracts/batch/src/batch.rs: create missing module file (declared via "mod batch;" in lib.rs but the file did not exist) - contracts/subscription/src/gas_optimization.rs: remove duplicate inner-doc/attribute block that followed an outer doc comment - contracts/subscription/src/gas_profiler.rs: same fix - contracts/subscription/src/gas_storage.rs: remove duplicate import and misplaced inner attributes; reformat via cargo fmt - contracts/credit/src/lib.rs: reformat via cargo fmt - Run cargo fmt across all contracts Merge conflict fix: - backend/services/notification/alerting.ts: resolve unresolved conflict markers that blocked TypeScript compilation
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Summary
Closes #939
Implements structured logging with correlation IDs across the backend and ML service.
Changes
ml-service/main.pyStructuredLoggerclass — JSON-formatted output that auto-injects the active correlation ID into every log entryContextVar-based storage so correlation IDs propagate correctly across async request boundariesX-Correlation-IDfrom incoming requests (or generates a UUID if absent), stores it in context, records request/response telemetry, and forwards the header in the responseml-service/tests/test_structured_logging.py(new)Acceptance Criteria
Testing