Land feature 57's node-engine work on its release branch

The node-engine renders the feature's templates, collections and moved
providers' files, on the SDK the feature's modules build on (feature 57,
config and provisioning).

internal/link/queue.go

@@ -65,8 +65,11 @@ type Queue struct {
 	// AccessAct judges and runs the take act on an access's folder, asked by the controller on an approved
 	// warrant (novox/hq ADR 0328 §7). Nil answers every such ask with a refusal.
 	AccessAct AccessActFunc
-	Say       Announce
-	Timeout   time.Duration
+	// MoveSecret moves one value sealed to this machine into the vault, asked by the controller during the move of
+	// the secrets (design 57's V3, issue 676). Nil answers every such ask with a refusal.
+	MoveSecret MoveSecretFunc
+	Say        Announce
+	Timeout    time.Duration
 
 	once sync.Once
 	wake chan struct{}