feat(F-120): completed feature

work/artifacts/F-120/security.json

@@ -0,0 +1,14 @@
+{
+  "feature_id": "F-120",
+  "agent": "security",
+  "stage": "security_gate",
+  "verdict": "APPROVED",
+  "reviewed_at": "2026-08-21",
+  "summary": "Cascade deletes are constrained to two FKs; no other tables affected.",
+  "checks": [
+    { "item": "CASCADE limited to catalog_product_categories and the categories self-reference", "ok": true },
+    { "item": "Products are not deleted (the FK is product_id, not category_id)", "ok": true },
+    { "item": "Authorization unchanged: still requireRole('admin')", "ok": true }
+  ],
+  "issues": []
+}