Rails migrations failing on production data

[ConnorSheremeta]

Our migrations are failing on the current integration_postmigration branch. This is due to attachments not having corresponsing blobs. I have the code I used to resolve this below:

ActiveStorage::Attachment.all.each do |asa|
  asb = ActiveStorage::Blob.find_by(id: asa.blob_id)
  asa.delete unless asb.present?
end

This should be put in the get_me_off_of_fedora rake task in the phase 1 branch.

I'm curious if the logo_id is cleared out of the item/thesis if one of these attachments missing a blob is a thumbnail. There is also an activestorageattachment.purge I believe (might be worth looking into the differences).

relates to #1685