- Fixed numerous bugs across executors, triggerer, scheduler, sensors, and DB load to improve stability and reliability.
- Updated and corrected documentation for DB schema, callbacks, trigger rules, DAG states, and removed misleading MSSQL info.
- Added security hardening by setting X‑Frame‑Options header to DENY when enabled and noted required DB upgrade.
Apache Airflow 2.2.5
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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.