Refactor validation behavior and update result view command

Refactored ValidationBehavior to use C# 12 primary constructors and file-scoped namespaces, simplifying the Handle method logic. Updated CreateResultViewCommand to implement IAuthScoped and IRequest, replaced AddedWho with a non-serialized Scope property, and added necessary usings and namespace.

src/ReC.Application/ResultViews/Commands/CreateResultViewCommand.cs

@@ -1,6 +1,10 @@
-namespace ReC.Application.ResultViews.Commands;
+using MediatR;
+using ReC.Application.Common.Interfaces;
+using System.Text.Json.Serialization;
 
-public class CreateResultViewCommand
+namespace ReC.Application.ResultViews.Commands;
+
+public class CreateResultViewCommand : IAuthScoped, IRequest
 {
     public required long ActionId { get; set; }
 
@@ -10,5 +14,6 @@ public class CreateResultViewCommand
 
     public string? Body { get; set; }
 
-    public string AddedWho { get; set; } = null!;
+    [JsonIgnore]
+    public AuthScope Scope { get; } = new();
 }