* Send non-error responses also. Settling on the name `RequestResponse` (after not being able to find a solid candidate) as it is response sent only when `request_id != 0`. Renaming `UNKNOWN` reason to `OK` as it was unused. Will bump up protocol and send `OK` only to client supporting that protocol version. * generated protobuf --------- Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>