Jellyfin Playback reporting

[Cwavs]

💬 User story

I use multi-scrobbler to scrobble music playback information onto other services, this relies on clients reporting playback information back to Jellyfin so it can forward it onto multi-scrobbler. Currently S2 doesn't do this, so any music played in it doesn't get scrobbled

📝 Notes

You can see whether playback is being reported or not on the server dashboard, where any relevant information to the track currently being played is shown. This doesn't appear for S2 at the moment, but does for something like Gelli:

If they currently don't its probably worth implementing this for Emby or Plex if they support it for feature parity, but I'll leave that up to future discussion as I'm have no way to know how they differ.

👩‍🔧 Technical Design Notes

These seem to be the relevant API calls in the Jellyfin docs: https://api.jellyfin.org/#tag/Playstate