Previously `jellyfinMediaId4k` was being assigned even if 4k server was not setup or even if 4k
content were not present. This fixes it by conditionally assigning the jellyfinMediaId and
JellyfinMediaId4k
fix#681
* feat(job): media availability support for jellyfin/emby
This refactors the media availability job to support jellyfin/emby for media removal automatically.
Needs further testing on 4k items (as I have not yet tested with 4k), however, non-4k items work as
intended.
fix#406, fix#193, fix#516, fix#362, fix#84
* fix(availabilitysync): use the correct 4k jellyfinMediaId
* fix: season mapping for plex
Fixes a bug introduced with this PR where media availability sync job removed the seasons from all
series even when those seasons existed
