Report track import errors correctly

app/models.py

@@ -784,7 +784,7 @@ class Tracks(Base):
         except IntegrityError as error:
             session.rollback()
             log.error(f"Error ({error=}) importing track ({path=})")
-            raise ValueError
+            raise ValueError(error)
 
     @classmethod
     def get_all(cls, session) -> List["Tracks"]:

app/musicmuster.py

@@ -170,7 +170,7 @@ class ImportTrack(QObject):
                 try:
                     track = Tracks(session, **metadata)
                 except Exception as e:
-                    self.signals.show_warning_signal.emit("Error importing track", e)
+                    self.signals.show_warning_signal.emit("Error importing track", str(e))
                     return
                 helpers.normalise_track(track.path)
                 # We're importing potentially multiple tracks in a loop.