Refactor user endpoint tests to include pagination and response structure validation

- Updated tests for listing users to validate pagination and response format.
- Changed mock return values to include total count and pagination details.
- Refactored user creation mocks for clarity and consistency.
- Enhanced assertions to check for presence of pagination fields in responses.
- Adjusted test cases for user retrieval and updates to ensure proper handling of user data.
- Improved readability by restructuring mock definitions and assertions across various test files.

tests/services/test_dashboard.py

@@ -43,7 +43,9 @@ class TestDashboardService:
             "total_duration": 75000,
             "total_size": 1024000,
         }
-        mock_sound_repository.get_soundboard_statistics = AsyncMock(return_value=mock_stats)
+        mock_sound_repository.get_soundboard_statistics = AsyncMock(
+            return_value=mock_stats,
+        )
 
         result = await dashboard_service.get_soundboard_statistics()