devices: stub-access driver (bench-test flows without a relay)

A live QR scan reached the app but rejected: 'reader not on an access-equipped
lane' — the dispatcher requires an access device on the reader's lane. Add a
no-op stub-access driver (access category, no config) whose pulseOpen only logs
and does no device I/O, so the QR->permit->accept flow (incl. the beep) can be
tested without the Dingtian relay connected. Not for production; registered in
the catalog.

packages/devices/src/drivers/index.ts

@@ -3,6 +3,7 @@
 
 import { registry } from "../registry.js";
 import { dingtianDriver } from "./access-dingtian.js";
+import { stubAccessDriver } from "./access-stub.js";
 import { dahuaDriver, hikvisionDriver } from "./camera.js";
 import { rongtaDriver } from "./printer-rongta.js";
 import { geeQrReaderDriver, tcpipReaderDriver, wiegandReaderDriver } from "./reader.js";
@@ -14,6 +15,7 @@ export function registerBuiltinDrivers(): void {
   if (registered) return;
   registered = true;
   registry.register(dingtianDriver);
+  registry.register(stubAccessDriver);
   registry.register(wiegandReaderDriver);
   registry.register(tcpipReaderDriver);
   registry.register(geeQrReaderDriver);
@@ -24,6 +26,7 @@ export function registerBuiltinDrivers(): void {
 
 export {
   dingtianDriver,
+  stubAccessDriver,
   wiegandReaderDriver,
   tcpipReaderDriver,
   geeQrReaderDriver,