- CronTriggerTimetable now respects catchup=False more accurately, requiring a full cron period pause to truly skip a run.
- conf.set() is made case‑insensitive to align with conf.get() and now validates that section and key are strings.
- Various bug fixes including security manager class reference, UI DAG count correction, Variable PATCH 404 response, and numerous task, sensor, and template handling improvements.
Apache Airflow 2.7.1
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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.