* fix validation in new form layout
* pin mediatr to last oss version
* update dependencies
* cleanup code in core
* cleanup code in ffmpeg
* cleanup code in infra
* cleanup code in scanner
* cleanup code in application
* cleanup main code
* cleanup test code
* solution-wide code cleanup
* catch health check cancellation
* local library scanner cleanup
* emby and jf library scanner cleanup
* rework emby movie library scanner
* refactor emby movie library scanner
* refactor jellyfin movie library scanner
* clear etag until after new media has been processed
* refactor plex movie library scanner
* update changelog
* rework plex movie library scanner; add unavailable media item state
* plex television scanner improvements
* reset plex etags as needed
* update changelog
* support external subtitles in local movie libraries
* code cleanup
* simplify subtitle updating
* skip external subtitles from media servers
* fix plex subtitles