Add XML documentation across gateway, worker, and .NET client

src/MxGateway.Server/Grpc/MxAccessGrpcRequestValidator.cs

@@ -5,6 +5,8 @@ namespace MxGateway.Server.Grpc;
 
 public sealed class MxAccessGrpcRequestValidator
 {
+    /// <summary>Validates an open session request.</summary>
+    /// <param name="request">The request to validate.</param>
     public void ValidateOpenSession(OpenSessionRequest request)
     {
         ArgumentNullException.ThrowIfNull(request);
@@ -15,18 +17,24 @@ public sealed class MxAccessGrpcRequestValidator
         }
     }
 
+    /// <summary>Validates a close session request.</summary>
+    /// <param name="request">The request to validate.</param>
     public void ValidateCloseSession(CloseSessionRequest request)
     {
         ArgumentNullException.ThrowIfNull(request);
         RequireSessionId(request.SessionId);
     }
 
+    /// <summary>Validates a stream events request.</summary>
+    /// <param name="request">The request to validate.</param>
     public void ValidateStreamEvents(StreamEventsRequest request)
     {
         ArgumentNullException.ThrowIfNull(request);
         RequireSessionId(request.SessionId);
     }
 
+    /// <summary>Validates an invoke request with command payload.</summary>
+    /// <param name="request">The request to validate.</param>
     public void ValidateInvoke(MxCommandRequest request)
     {
         ArgumentNullException.ThrowIfNull(request);