- Clarified that external health checks should use the new `airflow jobs check` CLI instead of SchedulerJob ORM classes.
- Added several bug fixes across components (scheduler health check, k8s executor pod tailing, DAG processing, API specs, UI rendering, etc.).
- Introduced support for dynamic tasks with pandas.DataFrame template fields and improved task group UI and documentation.
Apache Airflow 2.6.1
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Updated XCom handling for pandas 3, now storing the class name; all components must be upgraded or DataFrames from pandas 3 become unreadable.