fix: graceful machine shutdown when not initialised

internal/machine/machine.go

@@ -361,8 +361,9 @@ func (m *Machine) Run(ctx context.Context) error {
 				"Waiting for the machine to be initialised as a member of a cluster to start the cluster controller.",
 			)
 		}
-		<-m.initialised
 
+		select {
+		case <-m.initialised:
 			m.cluster.UpdateMachineID(m.state.ID)
 
 			// Ensure the corrosion config is up to date, including a new gossip address if the machine
@@ -418,6 +419,10 @@ func (m *Machine) Run(ctx context.Context) error {
 			}
 			slog.Info("Cluster controller stopped.")
 
+		case <-ctx.Done():
+			// The context was cancelled before the machine was initialised.
+		}
+
 		return nil
 	})