Updated get_album, get_album_tracks, and get_artist methods to return data structures compatible with Spotify's API format. This includes normalizing image arrays, artist and album fields, and adding synthetic URIs and external URLs for better interoperability.
Introduces core/itunes_client.py implementing an iTunes Search API client for music metadata, providing search and lookup for tracks, albums, and artists with rate limiting. Adds METADATA-FALLBACK-IMPLEMENTATION.md, a comprehensive guide comparing fallback strategies for music metadata, including anonymous Spotify access and iTunes, and outlines integration approaches for seamless user experience without requiring Spotify credentials.
