Refactor test files for improved readability and consistency

- Removed unnecessary blank lines and adjusted formatting in test files.
- Ensured consistent use of commas in function calls and assertions across various test cases.
- Updated import statements for better organization and clarity.
- Enhanced mock setups in tests for better isolation and reliability.
- Improved assertions to follow a consistent style for better readability.

tests/repositories/test_extraction.py

@@ -52,7 +52,7 @@ class TestExtractionRepository:
         assert result.service_id == extraction_data["service_id"]
         assert result.title == extraction_data["title"]
         assert result.status == extraction_data["status"]
-        
+
         # Verify session methods were called
         extraction_repo.session.add.assert_called_once()
         extraction_repo.session.commit.assert_called_once()