* 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
* Make pytest to user code from src rather than from install package
* Fix test_amundsen: missing None
* Update pytest configuration to use importlib mode
* Fix custom_basemodel_validation to check model_fields on type(values) to prevent noisy warnings
* Refactor referencedByQueries validation to use field_validator as per deprecation warning
* Update ColumnJson to use model_rebuild rather as replacement for forward reference updates as per deprecation warning
* Move superset test to integration test as they are using testcontainers
* Update coverage source path
* Fix wrong import.
* Add install_dev_env target to Makefile for development dependencies
* Add test-unit as extra in setup.py
* Modify dependencies in dev environment.
* Ignore all airflow tests
* Remove coverage in unit_ingestion_dev_env. Revert coverage source to prevent broken CI.
* Add nox for running unit test
* FIx PowerBI integration test to use pathlib for resource paths and not os.getcwd to prevent failures when not executed from the right path
* Move test_helpers.py to unit test, as it is not an integration test.
* Remove utils empty folder in integration tests
* Refactor testcontainers configuration to avoid pitfalls with max_tries setting
* Add nox unit testing basic setup
* Add format check session
* Refactor nox-unit and add plugins tests
* Add GHA for py-nox-ci
* Add comment to GHA
* Restore conftest.py file
* Clarify comment
* Simplify function
* Fix matrix startegy and nox mismatch
* Improve python version strategy with nox and GHA
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Co-authored-by: Pere Menal <pere.menal@getcollate.io>
