Wire -v/-vv/-vvv to a real stderr tracing subscriber (previously parsed
but never used), with NUNCIO_LOG/RUST_LOG override precedence matching
the daemon. Decode the WS-A1 ErrorInfo from a failed RPC's status
details and render the gRPC code plus the typed reason alongside the
message, in both text and --json output, instead of dropping the code
or dumping a raw Status. Document daemon log levels, the rotating log
file location, JSON log output, and request_id correlation in
docs/RUNNING.md.
Refs #365