feat(ADM-018): completed feature

work/artifacts/F-022/reviewer.json

@@ -0,0 +1,18 @@
+{
+  "feature_id": "F-022",
+  "agent": "reviewer",
+  "verdict": "APPROVED",
+  "summary": "F-022 review approved. Checkout orchestrator owns no persistence, composes existing services through public ports, enforces required idempotency_key, returns 409 on unavailable stock before any order/reservation, and reuses existing order on retry without re-reserving.",
+  "evidence": [
+    "Read work/current.md, architect.md and implementer.md",
+    "Inspected checkout domain/application/api and tests",
+    "Verified CheckoutService.execute short-circuits on idempotency lookup before any side effect",
+    "Verified reservation failure path releases reservations and transitions the order to CANCELLED",
+    "Verified checkout.test.ts confirms idempotent retry does not change inventory_stock counters",
+    "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 checkout/migrations suite passed: 14 files, 53 tests",
+    "./scripts/verify.sh passed"
+  ],
+  "timestamp": "2026-08-15T18:27:01Z"
+}