use ;
/// The `status` discriminator on a terminal `end` line, with its
/// optional `error` payload flattened into the parent object.
///
/// There is no `cancelled` variant: in-flight cancellation isn't
/// supported (see `StdioInput`). Anything that *would* have been a
/// cancel — drain-phase SIGTERM, runner shutdown — surfaces as an
/// `error` with a descriptive message.