[CHANGE] Reworked db with interceptors

Manager.YouTube/NetworkService.cs

@@ -31,4 +31,9 @@ public static class NetworkService
             return ResultError.Error(e);
         }
     }
+
+    public static async Task<Result<byte[]>> DownloadBytesAsync(HttpRequestMessage request, YouTubeClient client)
+    {
+        return ResultError.Fail("Not implemented");
+    }
 }

Manager.YouTube/YouTubeClient.cs

@@ -204,7 +204,7 @@ public sealed class YouTubeClient : IDisposable
 
     public void Dispose()
     {
-        HttpClient?.Dispose();
+        HttpClient.Dispose();
     }
     
     private async Task<Result<string>> GetCurrentAccountIdAsync()