Potential fix for code scanning alert no. 14: Information exposure through an exception

Co-authored-by: Copilot Autofix powered by AI <62310815+github-advanced-security[bot]@users.noreply.github.com>

Author: Deepthi-Chand

api/views/search_unified.py

@@ -381,7 +381,7 @@ def get(self, request: Any) -> Response:
 
         except Exception as e:
             self.logger.error("unified_search_error", error=str(e), exc_info=True)
-            return Response({"error": str(e)}, status=500)
+            return Response({"error": "An internal error has occurred."}, status=500)
 
     def _build_aggregations(
         self, results: List[Dict[str, Any]]