As part of clear-up after T383053, we inspected all 256x6 thumbnail container DBs and repaired the ones with errors.

This task is to perform the same check on the 256x6 commons originals containers (i.e. wikipedia-commons-local-public.[00-ff]); which is largely a case of running the sre.swift.check-dbs cookbook in a loop. Each container takes about 30s to check, so we expect this to take a couple of hours.