Add migration to backfill archived field for blobs

What does this MR do and why?

Add migration to backfill archived field for blob documents in main index.

Estimated Run time: ~7 days

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Before	After

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

MR acceptance checklist

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• I have evaluated the MR acceptance checklist for this MR.

Related to #414901 (closed)