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/database.js

@@ -0,0 +1,22 @@
+require('dotenv').config();
+const { Sequelize } = require('sequelize');
+
+const sequelize = new Sequelize(
+  process.env.DB_NAME || 'landvex_reports',
+  process.env.DB_USER || 'postgres',
+  process.env.DB_PASSWORD || 'postgres',
+  {
+    host: process.env.DB_HOST || 'localhost',
+    port: process.env.DB_PORT || 5432,
+    dialect: 'postgres',
+    logging: process.env.NODE_ENV === 'development' ? console.log : false,
+    pool: {
+      max: 10,
+      min: 0,
+      acquire: 30000,
+      idle: 10000
+    }
+  }
+);
+
+module.exports = sequelize;