Fix misleading comment and pin reprocess behaviour for partitioned backfill#68618
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…ckfill _create_backfill_dag_run_partitioned already created a new run when reprocess_behavior=FAILED/COMPLETED; the old comment incorrectly stated that partitioned backfills never reprocess existing runs. Adds a test to document and guard the intended behaviour (new run alongside the failed one, prior run kept as historical record).
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uranusjr
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amoghrajesh
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_create_backfill_dag_run_partitionedalready created a new run whenreprocess_behavior=FAILED/COMPLETED; the old comment incorrectly stated that partitioned backfills never reprocess existing runs. Adds a test to document and guard the intended behaviour (new run alongside the failed one, prior run kept as historical record).Was generative AI tooling used to co-author this PR?
Generated-by: [Claude] following the guidelines
{pr_number}.significant.rst, in airflow-core/newsfragments. You can add this file in a follow-up commit after the PR is created so you know the PR number.