feat(F-066): completed feature

work/artifacts/F-066/security.json

@@ -0,0 +1,13 @@
+{
+  "feature_id": "F-066",
+  "agent": "security",
+  "verdict": "APPROVED",
+  "summary": "No security boundary change. The PATCH endpoint was already gated by admin role; we just stopped it from 500-ing. The image container change is a CSS-only fix. Adding fields to serializeProduct expands the response shape but does not introduce a new write surface.",
+  "evidence": [
+    "PATCH /api/products/:id still requires admin role (unchanged)",
+    "JSON.stringify on attributes is the same encoding the JSONB parser expected; no new code path",
+    "serializeProduct expansion: read-only — the write path is unchanged",
+    "No new env vars, no new dependencies"
+  ],
+  "timestamp": "2026-08-19T15:25:00Z"
+}