pub const NROS_RMW_RET_CONNECTION_FAILED: NrosRmwRet = -18;Expand description
Phase 155.B.3 — backend reached the wire but couldn’t establish a
session. Maps to / from TransportError::ConnectionFailed /
Disconnected. Distinct from NROS_RMW_RET_ERROR so callers can
tell “can’t reach the router” from “internal backend invariant
tripped”.