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

src/MxGateway.Server/Grpc/MxAccessGatewayService.cs

@@ -9,6 +9,7 @@ using MxGateway.Server.Workers;
 
 namespace MxGateway.Server.Grpc;
 
+/// <summary>gRPC service implementation for MXAccess Gateway operations.</summary>
 public sealed class MxAccessGatewayService(
     ISessionManager sessionManager,
     IGatewayRequestIdentityAccessor identityAccessor,
@@ -18,6 +19,7 @@ public sealed class MxAccessGatewayService(
     GatewayMetrics metrics,
     ILogger<MxAccessGatewayService> logger) : MxAccessGateway.MxAccessGatewayBase
 {
+    /// <inheritdoc />
     public override async Task<OpenSessionReply> OpenSession(
         OpenSessionRequest request,
         ServerCallContext context)
@@ -56,6 +58,7 @@ public sealed class MxAccessGatewayService(
         }
     }
 
+    /// <inheritdoc />
     public override async Task<CloseSessionReply> CloseSession(
         CloseSessionRequest request,
         ServerCallContext context)
@@ -80,6 +83,7 @@ public sealed class MxAccessGatewayService(
         }
     }
 
+    /// <inheritdoc />
     public override async Task<MxCommandReply> Invoke(
         MxCommandRequest request,
         ServerCallContext context)
@@ -100,6 +104,7 @@ public sealed class MxAccessGatewayService(
         }
     }
 
+    /// <inheritdoc />
     public override async Task StreamEvents(
         StreamEventsRequest request,
         IServerStreamWriter<MxEvent> responseStream,