Apache Airflow 2.5.1

## Bug Fixes - Fix masking of non-sensitive environment variables (#28802) - Remove swagger-ui extra from connexion and install ``swagger-ui-dist`` via npm package (#28788) - Fix ``UIAlert`` should_show when ``AUTH_ROLE_PUBLIC`` set (#28781) - Only patch single label when adopting pod (#28776) - Update CSRF token to expire with session (#28730) - Fix "airflow tasks render" cli command for mapped task instances (#28698) - Allow XComArgs for ``external_task_ids`` of ExternalTaskSensor (#28692) - Row-lock TIs to be removed during mapped task expansion (#28689) - Handle ConnectionReset exception in Executor cleanup (#28685) - Fix description of output redirection for access_log for gunicorn (#28672) - Add back join to zombie query that was dropped in #28198 (#28544) - Fix calendar view for CronTriggerTimeTable dags (#28411) - After running the DAG the employees table is empty. (#28353) - Fix ``DetachedInstanceError`` when finding zombies in Dag Parsing process (#28198) - Nest header blocks in ``divs`` to fix ``dagid`` copy nit on dag.html (#28643) - Fix UI caret direction (#28624) - Guard not-yet-expanded ti in trigger rule dep (#28592) - Move TI ``setNote`` endpoints under TaskInstance in OpenAPI (#28566) - Consider previous run in ``CronTriggerTimetable`` (#28532) - Ensure correct log dir in file task handler (#28477) - Fix bad pods pickled in executor_config (#28454) - Add ``ensure_ascii=False`` in trigger dag run API (#28451) - Add setters to MappedOperator on_*_callbacks (#28313) - Fix ``ti._try_number`` for deferred and up_for_reschedule tasks (#26993) - separate ``callModal`` from dag.js (#28410) - A manual run can't look like a scheduled one (#28397) - Dont show task/run durations when there is no start_date (#28395) - Maintain manual scroll position in task logs (#28386) - Correctly select a mapped task's "previous" task (#28379) - Trigger gevent ``monkeypatching`` via environment variable (#28283) - Fix db clean warnings (#28243) - Make arguments 'offset' and 'length' not required (#28234) - Make live logs reading work for "other" k8s executors (#28213) - Add custom pickling hooks to ``LazyXComAccess`` (#28191) - fix next run datasets error (#28165) - Ensure that warnings from ``@dag`` decorator are reported in dag file (#28153) - Do not warn when airflow dags tests command is used (#28138) - Ensure the ``dagbag_size`` metric decreases when files are deleted (#28135) - Improve run/task grid view actions (#28130) - Make BaseJob.most_recent_job favor "running" jobs (#28119) - Don't emit FutureWarning when code not calling old key (#28109) - Add ``airflow.api.auth.backend.session`` to backend sessions in compose (#28094) - Resolve false warning about calling conf.get on moved item (#28075) - Return list of tasks that will be changed (#28066) - Handle bad zip files nicely when parsing DAGs. (#28011) - Prevent double loading of providers from local paths (#27988) - Fix deadlock when chaining multiple empty mapped tasks (#27964) - fix: current_state method on TaskInstance doesn't filter by map_index (#27898) - Don't log CLI actions if db not initialized (#27851) - Make sure we can get out of a faulty scheduler state (#27834) - dagrun, ``next_dagruns_to_examine``, add MySQL index hint (#27821) - Handle DAG disappearing mid-flight when dag verification happens (#27720) - fix: continue checking sla (#26968) - Allow generation of connection URI to work when no conn type (#26765) ## Misc/Internal - Remove limit for ``dnspython`` after eventlet got fixed (#29004) - Limit ``dnspython`` to < ``2.3.0`` until eventlet incompatibility is solved (#28962) - Add automated version replacement in example dag indexes (#28090) - Cleanup and do housekeeping with plugin examples (#28537) - Limit ``SQLAlchemy`` to below ``2.0`` (#28725) - Bump ``json5`` from ``1.0.1`` to ``1.0.2`` in ``/airflow/www`` (#28715) - Fix some docs on using sensors with taskflow (#28708) - Change Architecture and OperatingSystem classes into ``Enums`` (#28627) - Add doc-strings and small improvement to email util (#28634) - Fix ``Connection.get_extra`` type (#28594) - navbar, cap dropdown size, and add scroll bar (#28561) - Emit warnings for ``conf.get*`` from the right source location (#28543) - Move MyPY plugins of ours to dev folder (#28498) - Add retry to ``purge_inactive_dag_warnings`` (#28481) - Re-enable Plyvel on ARM as it now builds cleanly (#28443) - Add SIGUSR2 handler for LocalTaskJob and workers to aid debugging (#28309) - Convert ``test_task_command`` to Pytest and ``unquarantine`` tests in it (#28247) - Make invalid characters exception more readable (#28181) - Bump decode-uri-component from ``0.2.0`` to ``0.2.2`` in ``/airflow/www`` (#28080) - Use asserts instead of exceptions for executor not started (#28019) - Simplify dataset ``subgraph`` logic (#27987) - Order TIs by ``map_index`` (#27904) - Additional info about Segmentation Fault in ``LocalTaskJob`` (#27381) ## Doc Only Changes - Mention mapped operator in cluster policy doc (#28885) - Slightly improve description of Dynamic DAG generation preamble (#28650) - Restructure Docs (#27235) - Update scheduler docs about low priority tasks (#28831) - Clarify that versioned constraints are fixed at release time (#28762) - Clarify about docker compose (#28729) - Adding an example dag for dynamic task mapping (#28325) - Use docker compose v2 command (#28605) - Add AIRFLOW_PROJ_DIR to docker-compose example (#28517) - Remove outdated Optional Provider Feature outdated documentation (#28506) - Add documentation for [core] mp_start_method config (#27993) - Documentation for the LocalTaskJob return code counter (#27972) - Note which versions of Python are supported (#27798)