Add DELETE request handling in command handler

Implemented the handling of DELETE HTTP requests in the
InvokeRecActionCommandHandler class. Previously, the DELETE
case was unhandled, and now it uses http.DeleteAsync to
send a DELETE request to the specified action.EndpointUri,
supporting cancellation with the cancel token.

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

@@ -44,7 +44,7 @@ public class InvokeRecActionCommandHandler(ISender sender) : IRequestHandler<Inv
                 }
                 case "DELETE":
                 {
-                    // Handle DELETE
+                    using var response = await http.DeleteAsync(action.EndpointUri, cancel);
                     break;
                 }
                 default: