Add support for protobuf serialization as defined in the API: https://github.com/nexus-rpc/api/pull/18. Reference implementation in the Go SDK: https://github.com/nexus-rpc/sdk-go/pull/48.
Add support for protobuf serialization as defined in the API: nexus-rpc/api#18.
Reference implementation in the Go SDK: nexus-rpc/sdk-go#48.