docs: refresh Public Interface & align how-to guides for Airflow 3.0+ #52297
+285
−68
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This PR refreshed public-airflow-interface.rst for Airflow 3.0+, with the
airflow.sdk
, deprecating direct metadata DB access in task code, and pointing users to Task Context, REST API, or Python Client.This patch updates user how-to guides (connections, custom-operator, extra-link) to:
– Add versionchanged:: 3.0 notes warning against direct metadata-model imports
– Switch examples from
airflow.models.*
toairflow.sdk.*
classes and typescloses: #51590
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