Merge branch 'release-v28.0' into develop
Fixes for errors noticed in Mark B's review of *-to-dpla refactor
Updated export file structure (#7540)

Updated the structure per:
https://digitalpubliclibraryofamerica.atlassian.net/wiki/display/TECH/Database+export+files
Bumped version to 28.1
Merge branch 'release-v28.1'