fix(checkout-stock-recheck): checkout insufficient stock error still appears after cart sync fix

backlog/features.json

@@ -7930,14 +7930,16 @@
       "description": "Investigate why frontend still shows raw INSUFFICIENT_STOCK JSON / requested 17 vs available 16 after the recent fix. Verify deployment/version and fix any remaining stale cart sync or proxy behavior.",
       "priority": "high",
       "risk": "med",
-      "status": "pending",
+      "status": "done",
       "created_at": "2026-08-26",
       "gates": {
-        "reviewer": false,
-        "security": false,
-        "qa": false
+        "reviewer": true,
+        "security": true,
+        "qa": true,
+        "close": true
       },
-      "phase": "frontend"
+      "phase": "frontend",
+      "completed_at": "2026-08-26T18:33:55Z"
     },
     {
       "id": "PDP-IMAGE-WHITE-BG",