* 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
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Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>
* Proto to store forwarder state.
* generated protobuf
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Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>