Integrate ActiveJob / DeliverLater / GlobalID with Rails

WIP.
I don't think it's the same situation at all. This is something much more likely to trip you up. Some adapters take some params, others don't. It's much clearer to say "delayed job scheduling" is supported here and not there. Way too easy to write code that didn't need to use a custom class and that works on the random queue you're on, then doesn't work on the next. And there's just not enough gain.