Add drill: an ask the operator starts at the controller's terminal, whose approval performs nothing and is recorded (hq ADR 0259)

The live acceptance needs an approval the operator can ask for at will and that changes nothing. A
drill is asked like any condition's ask, bound to its own act, claimed once on its warrant and recorded
as a warrant hand-act with who answered, through which channel and the proofs. A verb's process may not
start one, so no agent asks the operator a question they did not start.

cmd/mesh-controller/main.go

@@ -78,6 +78,8 @@ func run() error {
 		return rotateCommand(ctx, args[1:])
 	case "ask":
 		return askCommand(ctx, args[1:])
+	case "drill":
+		return drillCommand(ctx, args[1:])
 	case "builds":
 		return buildsCommand(ctx, args[1:])
 	// The build queue, controlled by hand (novox/hq ADR 0219).