Sync takes a lot of time to discover new albums on Jellyfin server

upmpdcli-docker can be used to proxy subsonic servers making them available to UPnP control points - though I use MinimServer for my UPnP needs.

What classical tagging support does Jellyfin + Symfonium offer? I have a few classical albums, but as far as I know OpenSubsonic (I use Lightweight Music Server) only supports the Composer tag.