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

src/MxGateway.Server/Security/Authorization/GatewayGrpcScopeResolver.cs

@@ -5,6 +5,11 @@ namespace MxGateway.Server.Security.Authorization;
 
 public sealed class GatewayGrpcScopeResolver
 {
+    /// <summary>
+    /// Resolves the required authorization scope for a gRPC request.
+    /// </summary>
+    /// <param name="request">The gRPC request.</param>
+    /// <returns>Required authorization scope.</returns>
     public string ResolveRequiredScope(object request)
     {
         return request switch