* add png stripping code from google/wuffs
* experiment with stripping data from pngs
* add test images
* use StrippedPngDecode for pngs
* add StrippedPngDecode func
* update tests for (no)alphachannel pngs
* nolint on copied function
* Add whereNotEmptyAndNotNull
* Add GetRemoteOlderThanDays
* Add GetRemoteOlderThanDays
* Add PruneRemote to Manager interface
* Start implementing PruneRemote
* add new attachment + status to tests
* fix up and test GetRemoteOlderThan
* fix bad import
* PruneRemote: return number pruned
* add Cached column to mediaattachment
* update + test pruneRemote
* update mediaTest
* use Cached column
* upstep bun to latest version
* embed structs in mediaAttachment
* migrate mediaAttachment to new format
* don't default cached to true
* select only remote media
* update db dependencies
* step bun back to last working version
* update pruneRemote to use Cached field
* fix storage path of test attachments
* add recache logic to manager
* fix trimmed aspect ratio
* test prune and recache
* return errwithcode
* tidy up different paths for emoji vs attachment
* fix incorrect thumbnail type being stored
* expose TransportController to media processor
* implement tee-ing recached content
* add thoughts of dog to test fedi attachments
* test get remote files
* add comment on PruneRemote
* add postData cleanup to recache
* test thumbnail fetching
* add incredible diagram
* go mod tidy
* buffer pipes for recache streaming
* test for client stops reading after 1kb
* add media-remote-cache-days to config
* add cron package
* wrap logrus so it's available to cron
* start and stop cron jobs gracefully
