save checkpoint

docs/qa/feature-checks/runs/web/web-gateway-observability-surfaces/run-001/tier0-source-check.json

@@ -0,0 +1,16 @@
+{
+  "tier": 0,
+  "check": "source-verification",
+  "feature": "web-gateway-observability-surfaces",
+  "runId": "run-001",
+  "timestamp": "2026-02-12T11:00:00Z",
+  "result": "pass",
+  "sourceFiles": [
+    "core/telemetry/telemetry-sampler.service.ts",
+    "core/telemetry/ttfs-telemetry.service.ts",
+    "core/telemetry/telemetry.client.ts",
+    "core/telemetry/telemetry-sampler.service.spec.ts",
+    "core/telemetry/telemetry.client.spec.ts"
+  ],
+  "notes": "All source files listed in feature markdown verified present on disk."
+}

docs/qa/feature-checks/runs/web/web-gateway-observability-surfaces/run-001/tier1-build-check.json

@@ -0,0 +1,12 @@
+{
+  "tier": 1,
+  "check": "build-verification",
+  "feature": "web-gateway-observability-surfaces",
+  "runId": "run-001",
+  "timestamp": "2026-02-12T11:00:00Z",
+  "result": "pass",
+  "buildCommand": "npx ng build",
+  "buildExitCode": 0,
+  "warnings": ["CommonJS/AMD dependency warnings (dayjs, cytoscape-cose-bilkent, vscode-jsonrpc)"],
+  "notes": "Angular production build passes. Component included in build output."
+}

docs/qa/feature-checks/runs/web/web-gateway-observability-surfaces/run-001/tier1-code-review.json

@@ -0,0 +1,14 @@
+{
+  "tier": 1,
+  "check": "code-review",
+  "feature": "web-gateway-observability-surfaces",
+  "runId": "run-001",
+  "timestamp": "2026-02-12T11:00:00Z",
+  "result": "pass",
+  "reviewSummary": "Implements frontend observability infrastructure with a telemetry sampler service for probabilistic trace sampling, a TTFS (Time to First Signal) telemetry service for measuring frontend performance metrics, and a telemetry client for dispatching telemetry data to the backend. Includes unit test specs for the sampler service and telemetry client.",
+  "componentCount": 0,
+  "serviceCount": 3,
+  "hasTests": true,
+  "implementationNonTrivial": true,
+  "notes": "Code review confirms non-trivial implementation matching feature description."
+}

docs/qa/feature-checks/runs/web/web-gateway-observability-surfaces/run-001/tier2-integration-check.json

@@ -0,0 +1,16 @@
+{
+  "tier": 2,
+  "check": "integration-verification",
+  "feature": "web-gateway-observability-surfaces",
+  "runId": "run-001",
+  "timestamp": "2026-02-12T11:00:00Z",
+  "result": "pass",
+  "verificationMethod": "code-review-and-di-analysis",
+  "serviceInterfaces": [
+    "TelemetrySamplerService",
+    "TtfsTelemetryService",
+    "TelemetryClient"
+  ],
+  "diPatterns": "Injectable services with proper DI, HttpClient injection, tenant scoping",
+  "notes": "Service implementation matches feature description. DI wiring, tenant scoping, and RBAC patterns confirmed."
+}