fix: Add logger.warn() deprecation warning to filterwarnings ignore list

- Resolves CI test failures caused by DeprecationWarning from logger.warn() method
- Warning occurs in unit_tests/test_logger.py:81 where test intentionally uses deprecated method
- Follows established pattern of detailed inline comments for each ignored warning

Co-Authored-By: AJ Steers <[email protected]>

Author: devin-ai-integration[bot]

pytest.ini

@@ -22,6 +22,10 @@ filterwarnings =
     # Occurs in: airbyte_cdk/sources/utils/transform.py:23
     ignore:Importing Validator directly from the jsonschema package is deprecated:DeprecationWarning:airbyte_cdk.sources.utils.transform
 
+    # Python logging deprecation - logger.warn() method deprecated in favor of logger.warning()
+    # Occurs in: unit_tests/test_logger.py:81 (test intentionally uses deprecated method)
+    ignore:The 'warn' method is deprecated, use 'warning' instead:DeprecationWarning
+    
     # Unknown pytest markers - markers used in tests but not declared in pytest.ini
     ignore::pytest.PytestUnknownMarkWarning
 markers =