Fix event initialization issues

- Remove None assignment for download_progress event in AniworldLoader
- Remove None assignments for download_status and scan_status events in SeriesApp
- Events library requires events to not be initialized to None
- Verified logging configuration is properly set to INFO level

src/core/SeriesApp.py

@@ -154,8 +154,6 @@ class SeriesApp:
 
         # Initialize events
         self._events = Events()
-        self._events.download_status = None
-        self._events.scan_status = None
 
         self.loaders = Loaders()
         self.loader = self.loaders.GetLoader(key="aniworld.to")