Function event_kind_from_c 

pub fn event_kind_from_c(k: NrosRmwEventKind) -> EventKind

Convert a C ABI event-kind discriminant to the trait-level nros_rmw::EventKind. Replaces the retired From<NrosRmwEventKind> for nros_rmw::EventKind. Unknown values map to MessageLost, mirroring the forward direction’s fallback.