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/Services/Validation/StartupValidationOrchestrator.cs

@@ -0,0 +1,55 @@
+using Microsoft.Extensions.Options;
+using allstarr.Models.Settings;
+
+namespace allstarr.Services.Validation;
+
+/// <summary>
+/// Orchestrates startup validation for all configured services.
+/// This replaces the old StartupValidationService with a more extensible architecture.
+/// </summary>
+public class StartupValidationOrchestrator : IHostedService
+{
+    private readonly IEnumerable<IStartupValidator> _validators;
+    private readonly IOptions<SubsonicSettings> _subsonicSettings;
+
+    public StartupValidationOrchestrator(
+        IEnumerable<IStartupValidator> validators,
+        IOptions<SubsonicSettings> subsonicSettings)
+    {
+        _validators = validators;
+        _subsonicSettings = subsonicSettings;
+    }
+
+    public async Task StartAsync(CancellationToken cancellationToken)
+    {
+        Console.WriteLine();
+        Console.WriteLine("========================================");
+        Console.WriteLine("       allstarr starting up...       ");
+        Console.WriteLine("========================================");
+        Console.WriteLine();
+
+        // Run all validators
+        foreach (var validator in _validators)
+        {
+            try
+            {
+                await validator.ValidateAsync(cancellationToken);
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine($"Error validating {validator.ServiceName}: {ex.Message}");
+            }
+        }
+
+        Console.WriteLine();
+        Console.WriteLine("========================================");
+        Console.WriteLine("       Startup validation complete      ");
+        Console.WriteLine("========================================");
+        Console.WriteLine();
+    }
+
+    public Task StopAsync(CancellationToken cancellationToken)
+    {
+        return Task.CompletedTask;
+    }
+}