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Add and backfill namespace_id for incident_management_pending_issue_escalations

Shubham Kumarrequested to merge
backfill-desired-sharding-key-small-table-incident_management_pending_issue_escalations into master

What does this MR do and why?

Add and backfill namespace_id for incident_management_pending_issue_escalations.

  • This is a partitioned table with non unique composite primary keys "incident_management_pending_issue_escalations_pkey" PRIMARY KEY, btree (id, process_at)

  • We have used cursor based batching

Once the background migration has completed, a second merge request will be created to finalize the background migration and validate the not null constraint.

Related to #493768 (closed)

Edited by Shubham Kumar

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