Congratulations with your release!

What is the current support level for `scale-out` clusters? I can find a thing or two about high availability [1] and a small set of transaction isolation levels [2], but I'm unable to find detailed information about locking mechanisms and cluster propagation. Is this a documentation problem, is it fully analogous to PostgreSQL or rather something that is still on the roadmap?

[1]: https://www.edgedb.com/docs/reference/backend_ha

[2]: https://www.edgedb.com/docs/stdlib/sys#type::sys::Transactio...