Add migrated to .NET 8.0 variant of Hcs.Client

Hcs.ClientNet/Client/Api/Request/GostSigningEndpointBehavior.cs

@@ -0,0 +1,23 @@
+using System.ServiceModel.Channels;
+using System.ServiceModel.Description;
+using System.ServiceModel.Dispatcher;
+
+namespace Hcs.ClientNet.Api.Request
+{
+    internal class GostSigningEndpointBehavior(ClientBase client) : IEndpointBehavior
+    {
+        private readonly ClientBase client = client;
+
+        public void AddBindingParameters(ServiceEndpoint endpoint, BindingParameterCollection bindingParameters) { }
+
+        public void ApplyClientBehavior(ServiceEndpoint endpoint, ClientRuntime clientRuntime)
+        {
+            clientRuntime.ClientMessageInspectors.Add(
+                new GostSigningMessageInspector(client));
+        }
+
+        public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher) { }
+
+        public void Validate(ServiceEndpoint endpoint) { }
+    }
+}