- Added numerous features including TaskRunner start/finish notifications, DagRun state‑change listener plugin, dataset support in TaskFlow, a sensor decorator, PostgreSQL 15 support, and expanded audit logging for variables and connections.
- Implemented many bug fixes and performance improvements across the scheduler, UI (auto‑tail logs, adjustable grid view widths), XCom handling, and various operators, alongside UI enhancements and new metrics.
- Deprecated PostgreSQL 10 support and the core get‑kube‑client helper, and refreshed documentation with new examples, metric deprecations, and best‑practice guides.
Apache Airflow 2.5.0
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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.