Ask the operator for a condition's answers and act on the warrant, so release, stop, start and restart can be answered from any channel that proves who answered (hq ADR 0259)

internal/link/receive_nats.go

@@ -53,7 +53,7 @@ func Nats(js *broker.JetStream) Inbound {
 // whatever was asked for — and not at all when nothing was.
 func (n *natsInbound) Also(kind string) error {
 	switch kind {
-	case KindModuleMoved, KindCatchUp, KindSourceMoved, KindProvisioner, KindPullUpdated:
+	case KindModuleMoved, KindCatchUp, KindSourceMoved, KindProvisioner, KindPullUpdated, KindDecided:
 		n.follows[kind] = true
 		return nil
 	default:
@@ -259,6 +259,8 @@ func kindOfSubject(subject string) (string, bool) {
 		return KindSourceMoved, true
 	case PullUpdatedSubject:
 		return KindPullUpdated, true
+	case broker.DecidedSubject:
+		return KindDecided, true
 	case BuildOutcome(), BuildOutcomeOf(TheBuildMachineBefore):
 		// A build's outcome is the role's event now, so it arrives on the events stream rather than
 		// the control branch — and is acted on by the same handler, because what the controller does