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-report-system/config/redis.js

@@ -0,0 +1,14 @@
+require('dotenv').config();
+const Redis = require('ioredis');
+
+const redis = new Redis(process.env.REDIS_URL || 'redis://localhost:6379');
+
+redis.on('connect', () => {
+  console.log('Redis connected');
+});
+
+redis.on('error', (err) => {
+  console.error('Redis error:', err);
+});
+
+module.exports = redis;