feat(ADM-018): completed feature

work/artifacts/F-029/reviewer.json

@@ -0,0 +1,17 @@
+{
+  "feature_id": "F-029",
+  "agent": "reviewer",
+  "verdict": "APPROVED",
+  "summary": "F-029 review approved. Observability module adds Tracer/Meter abstractions with in-process implementations, /ops/metrics route (admin), and wired checkout tracing span + business metric. No new dependencies.",
+  "evidence": [
+    "Read work/current.md, architect.md and implementer.md",
+    "Inspected observability and checkout modules",
+    "Verified CheckoutService.execute starts/stops checkout.execute span",
+    "Verified checkoutCompleted metric path for business metric",
+    "gentle-ai review mode status: receipt-driven development off globally, ordinary Orquestra gate used",
+    "cd project && npm run lint/typecheck/build/test passed",
+    "DB integration migrations suite passed: 14 files, 53 tests",
+    "./scripts/verify.sh passed"
+  ],
+  "timestamp": "2026-08-15T19:33:26Z"
+}