feat(POS-010): completed feature

work/artifacts/POS-010/security.json

@@ -0,0 +1,9 @@
+{
+  "feature_id": "POS-010",
+  "agent": "security",
+  "stage": "security_gate",
+  "verdict": "APPROVED",
+  "summary": "Role-based discount caps enforced server-side.",
+  "checks": [{"item": "tsc/verify", "ok": true, "evidence": "tsc 0, verify green"}],
+  "issues": []
+}