Abstract distribution model

Example.Backend/Program.cs

@@ -27,6 +27,7 @@ class Program
         var listening = new IPEndPoint(IPAddress.Any, 4567);
         builder.Services.Configure<GatewayOptions>(options => options.Endpoint = listening);
         builder.Services.Configure<DistributionOptions>(o => o.DistributionType = EDistributionType.ExtractorFirst);
+        builder.Services.AddSingleton<IDistributionModule, ExtractorFirstDistributionModule>();
         
         builder.Services.AddSingleton<HubRequestExtractor>();
         builder.Services.AddSingleton<IExecuteModule, BasicExecutionModule>();