Migration to Foal will be a huge job for some installations. Whilst hopefully all snags will have been ironed out of any conversion tool before it is deployed in earnest, it's possible that some edge cases will cause issues, and will need subsequent adjustment.
To this end, I think it will be essential to know which records have been migrated, and which version of the software was used to do so (as well as the date). It may be worth including version and timestamp info in the direct archive and imports as well. One possible application would be to back-fill attachments which were originally ignored. S.
