Persist gRPC error messages

[hedhyw]

Is your feature request related to a problem? Please describe.

Currently, Zilla only reports only status codes without text descriptions.

For example if the server responds:

status.Error(codes.NotFound, "Example description")

Zilla persists the following Kafka headers (only status, no description):

The client receives an empty description:

rpc error: code = NotFound desc =

Describe the solution you'd like Include information about the error message.

Describe alternatives you've considered N/A

Additional context Probably, also relates to: https://github.com/aklivity/zilla/issues/730

[jfallows]

Thanks for the feature request @hedhyw.

It definitely makes sense for us to propagate the custom status description when present for consistency.