fix(dlp): block self-test case creation

aw-server/dlp-case-management/case_rules.py

@@ -0,0 +1,8 @@
+#!/usr/bin/env python3
+from __future__ import annotations
+
+
+def is_self_test_case(incident_id: str | None, title: str | None) -> bool:
+    incident = str(incident_id or "").lower()
+    label = str(title or "").lower()
+    return "|self_test|" in incident or label.startswith("dlp self_test")