feat(IAuthClientHandler): getrennte Klasse erstellt, um die Hub-Aktion von IAuthClient zu unterteilen

- ReceiveMessage-Methode zu IAuthClientHandler verschoben
 - StartAsync-Methode zu IAuthClient hinzugefügt

DigitalData.Auth.Abstractions/IAuthClient.cs

@@ -1,6 +1,6 @@
 namespace DigitalData.Auth.Abstractions;
 
-public interface IAuthClient
+public interface IAuthClient : IAuthClientHandler
 {
-    Task ReceiveMessage(string user, string message);
+    Task StartAsync();
 }

DigitalData.Auth.Abstractions/IAuthClientHandler.cs

@@ -0,0 +1,6 @@
+namespace DigitalData.Auth.Abstractions;
+
+public interface IAuthClientHandler
+{
+    Task ReceiveMessage(string user, string message);
+}

src/DigitalData.Auth.API/Hubs/AuthHub.cs

@@ -3,7 +3,7 @@ using Microsoft.AspNetCore.SignalR;
 
 namespace DigitalData.Auth.API.Hubs;
 
-public class AuthHub : Hub<IAuthClient>
+public class AuthHub : Hub<IAuthClientHandler>
 {
     public async Task SendMessage(string user, string message)
         => await Clients.All.ReceiveMessage(user, message);