Finalize BackfillEpicBasicFieldsToWorkItemRecord background migration
What does this MR do and why?
Related to #448452 (closed)
This migration backfilled epics.issue_id
column and was finished on production but we want to ensure it's finalized for self-managed instances too.
To confirm it has finished on production run
/chatops run batched_background_migrations status 1000540
In the following MR we'll introduce a NOT NULL constraint for this column, but it will be done in a post-deployment migration hence not needing a required stop. See !152625 (comment 1903989120) for more context.
Edited by Eugenia Grieff