Audit logging for imports

[camdendotlol]

Summary

This PR updates the import script to create version records for all imported records.

Closes #658

Testing notes

• Imports should work exactly the same as before. You shouldn't see any weird behavior from imports.
• After importing new records, you should see a row in the project audit log, as well as the record-specific audit log, showing a creation event.
  • There should be a user attached to the version row, and that user should be you 🫵
• After updating existing records via import, you should see a version row in the audit log that shows the change you made the same as if you'd made it via the form.
• Imports will take longer than before. But they shouldn't take drastically longer.