feat(F-111): completed feature

work/artifacts/F-111/security.json

@@ -0,0 +1,12 @@
+{
+  "feature_id": "F-111",
+  "agent": "security",
+  "verdict": "APPROVED",
+  "summary": "Both new endpoints require authenticate + requireRole admin; tracking max 120 and note max 500 validated; parameterized SQL; actor email stored for audit.",
+  "evidence": [
+    "admin auth enforced",
+    "zod length validation",
+    "no user HTML persisted"
+  ],
+  "timestamp": "2026-08-21T08:10:34Z"
+}