- Remove unused wav package import and WAV conversion logic
- Pass original downloaded audio file directly to fingerprinting
- Update calls from downloadYTaudio2 → downloadYTaudio after function rename
- Delete old downloadYTaudio1 function using github.com/kkdai/youtube
- Rename downloadYTaudio2 → downloadYTaudio as the primary yt-dlp-based downloader
- Replaced deprecated web token endpoint with POST to accounts.spotify.com/api/token
- Integrated client credentials OAuth flow using client ID and secret
- Adjusted request headers to use Bearer token