Refactor SQLite Database Provider

- Removed unused classes and files related to SQLite database provider, including SqliteDesignTimeJellyfinDbFactory, ModelBuilderExtensions, PragmaConnectionInterceptor, AssemblyInfo, SqliteDatabaseProvider, DateTimeKindValueConverter.
- Updated tests to remove dependencies on removed classes and adjusted mocking for configuration sections.
- Added Microsoft.EntityFrameworkCore.Sqlite package reference to test project.
- Improved string handling in tests for better consistency and clarity.
- Refactored logging methods in JellyfinApplicationFactory for better readability and maintainability.

Jellyfin.Server.Implementations/Security/AuthorizationContext.cs

@@ -149,7 +149,7 @@ namespace Jellyfin.Server.Implementations.Security
                 return authInfo;
             }
 
-            var tokenPreview = token?.Length > 8 ? token.Substring(0, 8) + "..." : token ?? "null";
+            var tokenPreview = token?.Length > 8 ? string.Concat(token.AsSpan(0, 8), "...") : token ?? "null";
             _logger.LogDebug(
                 "Validating authentication token. Client: {Client}, Device: {Device}, DeviceId: {DeviceId}, Token: {Token}",
                 client ?? "unknown",
@@ -255,7 +255,7 @@ namespace Jellyfin.Server.Implementations.Security
                     }
                     else
                     {
-                        var tokenPreview2 = token?.Length > 8 ? token.Substring(0, 8) + "..." : token ?? "null";
+                        var tokenPreview2 = token?.Length > 8 ? string.Concat(token.AsSpan(0, 8), "...") : token ?? "null";
                         _logger.LogDebug(
                             "Token validation failed: Token not found in devices or API keys. Token: {Token}",
                             tokenPreview2);