* rename + tidy up remote pruning
* fix media attachment account join
see https://bun.uptrace.dev/guide/golang-orm.html#table-relationships
* update logging to new function name
* add get avatars and headers to bun
* add pruneallmeta function
* don't set uncached since we're deleting anyway
* fix totalPruned being in wrong place
* test pruning meta
* go fmt ./...
* rename mediaprune
* add meta pruning to routine mediaprune
* tidy up cleanup job scheduling
* rename adminmediaremoteprune
* update mediacleanup to use renamed prune func
* update swagger docs a little bit
* reuse cancel + context
