Number of execution-artifact attribute rows stripped from completed jobs
Number of expired engine_streams rows hard-deleted
Number of expired job rows hard-deleted
Number of jobs marked as pruned (pruned_at set)
Number of expired stream message rows hard-deleted (engine + worker)
Number of transient (entity IS NULL) job rows hard-deleted
Number of expired worker_streams rows hard-deleted
Result returned by
DBA.prune(), providing deletion counts for observability and logging.