UUID. For instance, a scheduled worker kicks off and generates a UUID and sends messages to a queue consumer with the UUID as part of the message body. That queue also generates console.log messages. So, I've got two workers that are dealing with a single UUID and I'd like to use that data in my Tail Worker.UUID to something that will have it bubble up into the TailItems object? Otherwise, I need to add the UUID into the console.log messages and parse them out. It would be nice if extra metadata could be added to the TailItems's event node.