resolve artist column

[basings]

The clients table has a column called "Artist View". AFAIK a subsonic server can only share "album artists" and not artists. E.g. "Finamp" has a :heavy_check_mark: although it does not support "artist view". Finamp has an "album artist view" but it is named "artists". Although this is a minor difference it is an important one. The jellyfin android app and web client can distinguish between "album artists" and "artists".

• [x] add "album artist" column
• [x] check the old "artist" column that the clients actually support "artists" and not "album artists".

[basings]

to clarify finamp uses the jellyfin api and although the main app jellyfin can distinguish between album artists and artists, finamp can't. Hence, it's not enough to look for the api that's being used.

[basings]

Jellyfin actually differentiates between album artist and artist