- Introduced `cover_image_source` field in the Scene type, SceneCreateInput, and SceneUpdateInput to track the origin of cover images.
- Updated the GraphQL schema and corresponding resolver logic to handle the new field.
- Implemented default cover image source logic in the resolver for scene creation and updates.
- Added migration to include `cover_image_source` column in the scenes table.
- Enhanced UI components to support the new cover image source functionality, including updates to SceneEditPanel and SceneDetails.
