Use userId in player, other fixes (#3182)

* [bugfix] player: use userId, other fixes

This PR primarily resolves #1928 by switching the foreign key of `player` from `user.user_name` to `user.id`.
There are also a few other fixes/changes:

- For some bizarre reason, `ip_address` is never returned from `read`/`get`. Change the field to `ip`, which works. Somehow
- Update `players_test.go` mock to also check for user agent, replicating the actual code
- Update `player_repository.go` `isPermitted` to check user id. I don't know how this worked before...
- tests!
- a few places referred to `typ`, when it is really `userAgent`. Change the field names

* baseRequest -> selectPlayer

* remove comment

* update migration, make all of persistence foreign key enabled

* maybe don't forget to save the file first

core/scrobbler/play_tracker.go

@@ -118,7 +118,7 @@ func (p *playTracker) Submit(ctx context.Context, submissions []Submission) erro
 	username, _ := request.UsernameFrom(ctx)
 	player, _ := request.PlayerFrom(ctx)
 	if !player.ScrobbleEnabled {
-		log.Debug(ctx, "External scrobbling disabled for this player", "player", player.Name, "ip", player.IPAddress, "user", username)
+		log.Debug(ctx, "External scrobbling disabled for this player", "player", player.Name, "ip", player.IP, "user", username)
 	}
 	event := &events.RefreshResource{}
 	success := 0