Add Spotify downloader and enhanced API features

- Add spotify_downloader service for track/album/playlist downloads
- Update Spotify API endpoints with enhanced functionality
- Fix pydub utils import issues
- Update GitHub workflows for improved CI/CD

src/swingmusic/api/spotify.py

@@ -15,9 +15,8 @@ from swingmusic.utils import create_valid_filename
 
 spotify_bp = APIBlueprint(
     'spotify',
-    __name__,
-    url_prefix='/api/spotify',
-    abp_tag=Tag(name='Spotify', description='Spotify downloader operations')
+    import_name='spotify',
+    url_prefix='/api/spotify'
 )
 
 

src/swingmusic/api/spotify_settings.py

@@ -12,9 +12,8 @@ from swingmusic.config import UserConfig
 
 spotify_settings_bp = APIBlueprint(
     'spotify_settings',
-    __name__,
-    url_prefix='/api/settings/spotify',
-    abp_tag=Tag(name='Spotify Settings', description='Spotify downloader settings operations')
+    import_name='spotify_settings',
+    url_prefix='/api/settings/spotify'
 )