But a few ways you could hook without any code changes in dbcore: use LISTEN/NOTIFY or equivalent to hook on changes, poll for changes in the DB, "eject" the generated code and edit API handlers directly to call where you want, or just edit the default templates directly with whatever API handlers you want to call.

It's true there's not a great way to add hooks at a configuration level at the moment. But there are still many ways you could work around that.