feat: Fork octo-fiestarr as allstarr with Jellyfin proxy improvements

Major changes:
- Rename project from octo-fiesta to allstarr
- Add Jellyfin proxy support alongside Subsonic/Navidrome
- Implement fuzzy search with relevance scoring and Levenshtein distance
- Add POST body logging for debugging playback progress issues
- Separate local and external artists in search results
- Add +5 score boost for external results to prioritize larger catalog(probably gonna reverse it)
- Create FuzzyMatcher utility for intelligent search result scoring
- Add ConvertPlaylistToJellyfinItem method for playlist support
- Rename keys folder to apis and update gitignore
- Filter search results by relevance score (>= 40)
- Add Redis caching support with configurable settings
- Update environment configuration with backend selection
- Improve external provider integration (SquidWTF, Deezer, Qobuz)
- Add tests for all services

allstarr/Models/Settings/SubsonicSettings.cs

@@ -0,0 +1,155 @@
+namespace allstarr.Models.Settings;
+
+/// <summary>
+/// Media server backend type
+/// </summary>
+public enum BackendType
+{
+    /// <summary>
+    /// Subsonic-compatible server (Navidrome, Airsonic, etc.)
+    /// </summary>
+    Subsonic,
+    
+    /// <summary>
+    /// Jellyfin media server
+    /// </summary>
+    Jellyfin
+}
+
+/// <summary>
+/// Download mode for tracks
+/// </summary>
+public enum DownloadMode
+{
+    /// <summary>
+    /// Download only the requested track (default behavior)
+    /// </summary>
+    Track,
+    
+    /// <summary>
+    /// When a track is played, download the entire album in background
+    /// The requested track is downloaded first, then remaining tracks are queued
+    /// </summary>
+    Album
+}
+
+/// <summary>
+/// Explicit content filter mode for Deezer tracks
+/// </summary>
+public enum ExplicitFilter
+{
+    /// <summary>
+    /// Show all tracks (no filtering)
+    /// </summary>
+    All,
+    
+    /// <summary>
+    /// Exclude clean/edited versions (explicit_content_lyrics == 3)
+    /// Shows original explicit content and naturally clean content
+    /// </summary>
+    ExplicitOnly,
+    
+    /// <summary>
+    /// Only show clean content (explicit_content_lyrics == 0 or 3)
+    /// Excludes tracks with explicit_content_lyrics == 1
+    /// </summary>
+    CleanOnly
+}
+
+/// <summary>
+/// Storage mode for downloaded tracks
+/// </summary>
+public enum StorageMode
+{
+    /// <summary>
+    /// Files are permanently stored in the library and registered in the database
+    /// </summary>
+    Permanent,
+    
+    /// <summary>
+    /// Files are stored in a temporary cache and automatically cleaned up
+    /// Not registered in the database, no Navidrome scan triggered
+    /// </summary>
+    Cache
+}
+
+/// <summary>
+/// Music service provider
+/// </summary>
+public enum MusicService
+{
+    /// <summary>
+    /// Deezer music service
+    /// </summary>
+    Deezer,
+    
+    /// <summary>
+    /// Qobuz music service
+    /// </summary>
+    Qobuz,
+	
+	/// <summary>
+	/// SquidWTF music service
+	/// </summary>
+	SquidWTF
+}
+
+public class SubsonicSettings
+{
+    public string? Url { get; set; }
+    
+    /// <summary>
+    /// Explicit content filter mode (default: All)
+    /// Environment variable: EXPLICIT_FILTER
+    /// Values: "All", "ExplicitOnly", "CleanOnly"
+    /// Note: Only works with Deezer
+    /// </summary>
+    public ExplicitFilter ExplicitFilter { get; set; } = ExplicitFilter.All;
+    
+    /// <summary>
+    /// Download mode for tracks (default: Track)
+    /// Environment variable: DOWNLOAD_MODE
+    /// Values: "Track" (download only played track), "Album" (download full album when playing a track)
+    /// </summary>
+    public DownloadMode DownloadMode { get; set; } = DownloadMode.Track;
+    
+    /// <summary>
+    /// Music service to use (default: Deezer)
+    /// Environment variable: MUSIC_SERVICE
+    /// Values: "Deezer", "Qobuz", "SquidWTF"
+    /// </summary>
+
+    public MusicService MusicService { get; set; } = MusicService.SquidWTF;
+    
+    /// <summary>
+    /// Storage mode for downloaded files (default: Permanent)
+    /// Environment variable: STORAGE_MODE
+    /// Values: "Permanent" (files saved to library), "Cache" (temporary files, auto-cleanup)
+    /// </summary>
+    public StorageMode StorageMode { get; set; } = StorageMode.Permanent;
+    
+    /// <summary>
+    /// Cache duration in hours for Cache storage mode (default: 1)
+    /// Environment variable: CACHE_DURATION_HOURS
+    /// Files older than this duration will be automatically deleted
+    /// Only applies when StorageMode is Cache
+    /// </summary>
+    public int CacheDurationHours { get; set; } = 1;
+    
+    /// <summary>
+    /// Enable external playlist search and streaming (default: true)
+    /// Environment variable: ENABLE_EXTERNAL_PLAYLISTS
+    /// When enabled, users can search for playlists from the configured music provider
+    /// Playlists appear as "albums" in search results with genre "Playlist"
+    /// </summary>
+    public bool EnableExternalPlaylists { get; set; } = true;
+    
+    /// <summary>
+    /// Directory name for storing playlist .m3u files (default: "playlists")
+    /// Environment variable: PLAYLISTS_DIRECTORY
+    /// Relative to the music library root directory
+    /// Playlist files will be stored in {MusicDirectory}/{PlaylistsDirectory}/
+    /// </summary>
+    public string PlaylistsDirectory { get; set; } = "playlists";
+
+}