yes! I've seen that and I'm considering writing some sort of similar postgres -> protobuf layer so that I can automatically generate my grpc structs from postgres enums.

Right now a pain point for us is that we have a generated database layer, a generated protobuf layer, and we have to do lots of fiddly manual database -> grpc struct translations. Too easy to get off-by-one errors (because you usually need a null enum element in protobuf that you don't need in postgres, particularly)