Improve full database update sanity check

app/songdb.py

@@ -150,18 +150,15 @@ def full_update_db(session):
         if not tag['title']:
             log(f"track[{track.id}] {track.title=}: No tag title")
             continue
+        if not tag['artist']:
+            log(f"track[{track.id}] {track.artist=}: No tag artist")
+            continue
 
-        if track.artist:
-            if track.artist != tag['artist']:
-                log(
-                    f"track[{track.id}] artist mismatch: "
-                    f"{track.artist=} {tag['artist']=}"
-                )
-                continue
-
-        # Update title
+        # Update title and artist
         if track.title != tag['title']:
             track.title = tag['title']
+        if track.artist != tag['artist']:
+            track.artist = tag['artist']
 
         # Update numbers; log if more than 10% different
         duration = int(round(