- Fixed numerous bugs affecting stability, performance, and UI (e.g., memory leak in DAG processor, CPU spike prevention, virtualized log viewer, API schema fixes).
- Added support for macros via plugins and back‑compatibility shims for EmailOperator and BaseNotifier, plus enhancements to API metadata (owner links, asset alias).
- Updated documentation with migration guidance, Apple Silicon setup, deprecation notices, and cleaned up release notes.
Airflow 3.0.2
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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.