server: refactor create version/format into separate method
fixup! 3dba39c4
server: manage command to view single ebook in DB
fixup! 8d4bd2b3367b016802abe42bcd49a65edcf54019
server: renamed source_patched to ogreid_tagged
fixup! f0fe1c54db469db72fa28c72db7c992acf18b344