Andrey Anshin

Some refactor cloudpickle support which added into the https://github.com/apache/airflow/pull/38531 Use new `serializer` parameter for specify serialiser, this one for avoid boolean trap. Deprecate `use_dill` parameter in favor of `serializer="dill"` and...

related: https://github.com/apache/airflow/issues/38642 --- **^ Add meaningful description above** Read the **[Pull Request Guidelines](https://github.com/apache/airflow/blob/main/contributing-docs/05_pull_requests.rst#pull-request-guidelines)** for more information. In case of fundamental code changes, an Airflow Improvement Proposal ([AIP](https://cwiki.apache.org/confluence/display/AIRFLOW/Airflow+Improvement+Proposals)) is needed. In...

Avoid usage of deprecated `datetime.datetime.utcfromtimestamp` in `pendulum.from_timestamp`

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## Pull Request Check List - [x] Added **tests** for changed code. - [x] Updated **documentation** for changed code. `datetime.datetime.utcfromtimestamp()` is deprecated into the [Python 3.12](https://docs.python.org/3/whatsnew/3.12.html#deprecated) as result current implementation...

Mock all connections in `TestYandexCloudYqHook::test_select_results`

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### Body Originally reported in [Slack](https://apache-airflow.slack.com/archives/C06K9Q5G2UA/p1714533835490519) **Jed Cunningham 7:23 AM** Feels like we might have missed mocking something in the yandex test suite. We are getting grpc failures - seems...

Move core system tests outside of providers system tests

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This tests for Core, not providers, so better store it separatly. I'm not sure but maybe we should move it into the `airflow/example_dags` --- **^ Add meaningful description above** Read...

--- **^ Add meaningful description above** Read the **[Pull Request Guidelines](https://github.com/apache/airflow/blob/main/contributing-docs/05_pull_requests.rst#pull-request-guidelines)** for more information. In case of fundamental code changes, an Airflow Improvement Proposal ([AIP](https://cwiki.apache.org/confluence/display/AIRFLOW/Airflow+Improvement+Proposals)) is needed. In case of...

[`backref`](https://docs.sqlalchemy.org/en/14/orm/backref.html) is a legacy approach for construct relationships, instead of that preferable way is use [`back_populates`](https://docs.sqlalchemy.org/en/14/orm/relationship_api.html#sqlalchemy.orm.relationship.params.back_populates) keyword argument in [`relationship`](https://docs.sqlalchemy.org/en/14/orm/relationship_api.html#sqlalchemy.orm.relationship) for built it explicitly --- **^ Add meaningful description above**...

```json { "category": "sqlalchemy.exc.RemovedIn20Warning", "message": "The legacy calling style of select() is deprecated and will be removed in SQLAlchemy 2.0. Please use the new calling style described at select(). (Background...

Move prohibited warnings detection in deferrable pytest plugin

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related: https://github.com/apache/airflow/issues/38642 Move all logic around existed functionality into the separate plugin, which allow to do additional things without turned root `conftest.py` into the mess - Allow to disable detect...

[WIP] Support Flask Session 0.7

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related: #36897 What is found and doesn't work now - [x] Python 3.8 support (https://github.com/pallets-eco/flask-session/pull/219) - [ ] Querying postgres backend --- **^ Add meaningful description above** Read the **[Pull...