fix: only record spotify's trackid, ignore local ones

lrx_cli/cache.py

@@ -71,8 +71,7 @@ class CacheEngine:
                     expires_at INTEGER,
                     artist TEXT,
                     title TEXT,
-                    album TEXT,
-                    length INTEGER
+                    album TEXT
                 )
             """)
             # Migrations

lrx_cli/mpris.py

@@ -141,6 +141,8 @@ async def _fetch_metadata_dbus(
                         trackid = trackid.removeprefix("spotify:track:")
                     elif trackid.startswith("/com/spotify/track/"):
                         trackid = trackid.removeprefix("/com/spotify/track/")
+                    else:
+                        trackid = None
 
             # Extract length (usually microseconds)
             length = metadata.get("mpris:length", None)