SignalRMessages improvements

AyCode.Services/SignalRs/IAcSignalRHubClient.cs

@@ -1,7 +1,26 @@
-using MessagePack;
+using AyCode.Core.Extensions;
+using MessagePack;
 
 namespace AyCode.Services.SignalRs;
 
+[MessagePackObject]
+public class SignalPostJsonDataMessage(object postData) : ISignalPostMessage<string>
+{
+    [Key(0)] public string PostData { get; private set; } =  postData.ToJson();
+}
+
+[MessagePackObject]
+public class SignalPostMessage<TPostData>(TPostData postData) : ISignalPostMessage<TPostData>
+{
+    [Key(0)]
+    public TPostData? PostData { get; set; } = postData;
+}
+
+public interface ISignalPostMessage<out TPostData> : ISignalRMessage
+{
+    TPostData? PostData { get; }
+}
+
 [MessagePackObject]
 public class SignalRequestByIdMessage(Guid id) : ISignalRequestMessage<Guid>
 {