fix(configuration): ensure default PIDs are set for Album and Track

Signed-off-by: Deluan <deluan@navidrome.org>

conf/configuration.go

@@ -1,6 +1,7 @@
 package conf
 
 import (
+	"cmp"
 	"fmt"
 	"net/url"
 	"os"
@@ -369,6 +370,10 @@ func Load(noConfigDump bool) {
 		disableExternalServices()
 	}
 
+	// Make sure we don't have empty PIDs
+	Server.PID.Album = cmp.Or(Server.PID.Album, consts.DefaultAlbumPID)
+	Server.PID.Track = cmp.Or(Server.PID.Track, consts.DefaultTrackPID)
+
 	logDeprecatedOptions("Scanner.GenreSeparators", "")
 	logDeprecatedOptions("Scanner.GroupAlbumReleases", "")
 	logDeprecatedOptions("DevEnableBufferedScrobble", "") // Deprecated: Buffered scrobbling is now always enabled and this option is ignored