perf: paginate admin audit lists

ai_knowledge_base_v2/apps/backend/app/api/pagination.py

@@ -0,0 +1,7 @@
+from __future__ import annotations
+
+from typing import Any
+
+
+def page_result(items: list[Any], *, total: int, page: int, page_size: int) -> dict[str, Any]:
+    return {"items": items, "total": total, "page": page, "pageSize": page_size}