feat: Passwordless cross-device authentication

- Arkitektur: docs/auth/passwordless-architecture.md
- Backend: iom/quixzoom-auth-service/ (FastAPI + Redis)
- Webb: quixzoom-market-pages/se/login/ (QR-kod + polling)
- App: iom/quixzoom-app/src/features/auth/ (push + deep links)

Flöde: QR-kod → app-godkännande → webb-inloggad

landvex/node_modules/@dabh/diagnostics/adapters/index.js

@@ -0,0 +1,18 @@
+var enabled = require('enabled');
+
+/**
+ * Creates a new Adapter.
+ *
+ * @param {Function} fn Function that returns the value.
+ * @returns {Function} The adapter logic.
+ * @public
+ */
+module.exports = function create(fn) {
+  return function adapter(namespace) {
+    try {
+      return enabled(namespace, fn());
+    } catch (e) { /* Any failure means that we found nothing */ }
+
+    return false;
+  };
+}