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Pull request overview
Updates the statistics maintenance cronjob to be more resilient to transient database lock conflicts during cleanup operations, reducing the chance that the whole maintenance run fails due to lock wait timeouts or deadlocks.
Changes:
- Add tracking/reporting of deferred delete batches when deletes are skipped due to persistent DB locks.
- Increase delete retry attempts and introduce a small linear backoff between retries.
- Centralize lock-timeout/deadlock detection into a helper (
isRetryableLockException()), including support for error codes 1205 and 1213.
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