Adds Messaging streaming

src/Web/Features/Contents/Data/Content.cs

@@ -4,7 +4,7 @@ public class Content
 {
     public Guid Id { get; init; }
     public Guid CreatedBy { get; init; }
-    public DateTimeOffset CreatedAt { get; }
+    public DateTimeOffset CreatedAt { get; init; }
 
     public string? Title { get; init; }
     public string? Description { get; init; }