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/istanbul-lib-coverage/lib/data-properties.js

@@ -0,0 +1,12 @@
+'use strict';
+
+module.exports = function dataProperties(klass, properties) {
+    properties.forEach(p => {
+        Object.defineProperty(klass.prototype, p, {
+            enumerable: true,
+            get() {
+                return this.data[p];
+            }
+        });
+    });
+};