Refactor RootAction to Root in RecActionView

Renamed the `RootAction` property to `Root` in the `RecActionView` class to improve clarity and align with naming conventions. Updated the `ReadRecActionQueryHandler` class to reference the renamed property in its LINQ query, ensuring consistency between the data model and query logic.

src/ReC.Domain/Entities/RecActionView.cs

@@ -18,7 +18,7 @@ public class RecActionView
     public required long Id { get; set; }
 
     [ForeignKey("Id")]
-    public RecAction? RootAction { get; set; }
+    public RecAction? Root { get; set; }
 
     [Column("PROFILE_ID")]
     public long? ProfileId { get; set; }