fix(lint): resolve ruff errors in tests and run_tests.py

- Fix import sorting (I001)
- Remove unused imports and variables (F401, F841)
- Add noqa for test code (S106 hardcoded passwords, S314 XML parsing)
- Auto-format with ruff format

tests/apps/core/test_response.py

@@ -101,9 +101,7 @@ class APIPaginatedResponseTest(TestCase):
     def test_paginated_response(self):
         """Test paginated response with correct metadata"""
         data = [{"id": 1}, {"id": 2}]
-        response = api_paginated_response(
-            data, page=1, page_size=10, total_count=25
-        )
+        response = api_paginated_response(data, page=1, page_size=10, total_count=25)
 
         self.assertEqual(response.status_code, status.HTTP_200_OK)
         self.assertEqual(response.data["data"], data)