I have a few questions I can't find after skimming the documentation.. Can someone use Postgres extensions with EdgeDB, like TimescaleDB, PostGIS, Zombodb and

I have a few questions I can't find after skimming the documentation.. Can someone use Postgres extensions with EdgeDB, like TimescaleDB, PostGIS, Zombodb and Postgres_fdw? How are sum types (called enums in Rust) modelled in EdgeDB? (like Rust's Result). Do I need to define it with inheritance, where each variant inherits from it? What about adding specific syntax for sum types? edit: also, I see there's a WIP custom #[derive] for Rust in https://github.com/edgedb/edgedb-rust https://github.com/edgedb/edgedb-rust - can it store Rust types on EdgeDB? Something like http://diesel.rs/ http://diesel.rs/ or even https://lib.rs/crates/turbosql https://lib.rs/crates/turbosql