Add Sequence property to CreateRecActionCommand

A new `Sequence` property of type `byte` was added to the
`CreateRecActionCommand` record. It is initialized with a
default value of `1` and includes a `set` accessor, making
it mutable. This property allows the record to store or
manipulate sequence-related information, enhancing its
functionality.

src/ReC.Application/RecActions/Commands/CreateRecActionCommand.cs

@@ -21,6 +21,8 @@ public record CreateRecActionCommand : IRequest
     public string? HeaderQuery { get; init; }
 
     public string BodyQuery { get; init; } = null!;
+
+    public byte Sequence { get; set; } = 1;
 }
 
 public class CreateRecActionCommandHandler(ISender sender, IRepository<RecAction> repo) : IRequestHandler<CreateRecActionCommand>