Method to_failed

nodedb-cluster/src/lifecycle_state.rs:157–161

(&self, reason: impl Into<String>)

    }

    pub fn to_failed(&self, reason: impl Into<String>) {
        let reason = reason.into();
        let detail = format!("failed: {reason}");
        self.transition(ClusterLifecycleState::Failed { reason }, &detail);
    }

    /// Shared implementation: swap the state, log at INFO, push the
    /// status string to systemd.