feat(POS-003): completed feature

work/artifacts/POS-003/security.json

@@ -0,0 +1,13 @@
+{
+  "feature_id": "POS-003",
+  "agent": "security",
+  "stage": "security_gate",
+  "verdict": "APPROVED",
+  "summary": "No new routes, no new auth, no secrets. All DB queries parameterized. POS module isolated in its own directory.",
+  "checks": [
+    {"item": "No new auth", "ok": true, "evidence": "No routes added; POS-004 will add auth"},
+    {"item": "No new secrets", "ok": true, "evidence": "No env vars or credentials added"},
+    {"item": "Parameterized queries", "ok": true, "evidence": "All DB queries use $1, $2 placeholders"}
+  ],
+  "issues": []
+}