DEV: Change upload verified column to be integer (PR #10643)

fix_missing_s3 in uploads.rake isn’t working now because of this line:

upload.update!(etag: fixed_upload.etag, url: fixed_upload.url, verified: nil)

ActiveModel::UnknownAttributeError: unknown attribute ‘verified’ for Upload.

What is the verification_status equivalent for nil?

@nlalonde sorry I must have missed that one, I thought I checked all the verified places. The equivalent to nil is unchecked (1)