semi implemented and features implemented save checkpoint

docs/features/unimplemented/gateway/stellarouter-performance-testing-pipeline.md

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+# StellaRouter Performance Testing Pipeline (k6 + Prometheus + Correlation IDs)
+
+## Module
+Gateway
+
+## Status
+PARTIALLY_IMPLEMENTED
+
+## Description
+The StellaRouter gateway service exists but the advisory's proposed k6 performance testing scenarios (A-G), correlation ID instrumentation, and Prometheus metric dashboards for performance curve modeling are not present as source code artifacts. These may exist as devops artifacts outside src/.
+
+## What's Implemented
+- Gateway service with full middleware pipeline: `src/Gateway/StellaOps.Gateway.WebService/`
+- Correlation ID middleware: `src/Gateway/StellaOps.Gateway.WebService/Middleware/CorrelationIdMiddleware.cs`
+- Gateway metrics: `src/Gateway/StellaOps.Gateway.WebService/Services/GatewayMetrics.cs` -- Prometheus-compatible metrics
+- Health monitoring: `src/Gateway/StellaOps.Gateway.WebService/Services/GatewayHealthMonitorService.cs`
+- Source: Feature matrix scan
+
+## What's Missing
+- k6 performance testing scripts (scenarios A-G)
+- Prometheus metric dashboards for performance curve modeling
+- These may exist under `devops/` rather than `src/` -- check `devops/` directory
+
+## Implementation Plan
+- Create k6 test scripts for Gateway performance scenarios
+- Add Grafana/Prometheus dashboards for Gateway metrics visualization
+- These are DevOps artifacts and may belong under `devops/perf/` or similar
+
+## Related Documentation
+- Source: See feature catalog