Vacuum only hivemind table, in threads

Alternative approach to !809 (closed), doesn't need any extra permissions.

• Runs vacuum in python threads
• Fix logging message

Closes #221 (closed)

changed milestone to %JulyHivemind

assigned to @klesniak

mentioned in merge request !809 (closed)

marked this merge request as draft

added 16 commits

• f9139083...d1959d3f - 14 commits from branch develop
• c82c16ab - Vacuum only hivemind tables, in threads
• 16ec9486 - Fix log

Compare with previous version

marked this merge request as ready

enabled an automatic merge when all merge checks for 16ec9486 pass

canceled the automatic merge

merged