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* fix(airflow): correctly extract owners from serialized Airflow DAGs Airflow serialization format wraps tasks under `__var` and `__type`. Previously, the OpenMetadata Airflow connector failed to extract task owners properly in this format. This patch: - Flattens `__var` when parsing task owners - Fallbacks to `default_args["owner"]` if no task-level owner is explicitly present - Ensures correct DAG owner is picked as the most common task owner - Handles compatibility with older Airflow versions Fixes: #21106 * test(airflow): add tests for owner extraction from serialized Airflow DAGs Adds new test cases to validate owner extraction logic: - Owners from serialized task format (`__var`) - Fallback to `default_args['owner']` if task owners are missing - Resolution of most common owner - Compatibility with unstructured or missing owners * remove test version specific comment * simplify comments and warnings * fix return statement * fixing formatting * adding handling of default args * fixing and adding more tests