This seems really cool, I've used Pocketbase before for similar purposes, the only thing it doesn't offer is local-first (which is a bit of a bummer). But one very valuable feature it has is server extensibility. You can write server hooks in JS and Go (it's embeddable as a Go module) to add features you need. For example, in a previous project, I added functionality to send push notifications based on certain user actions. Is this kind of thing possible in InstantDB? Or, would I need to build a worker that listens for those events and fires off the notification on its own?

Also, are there plans to release SDKs in other languages (namely, Dart)?