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/undici/lib/interceptor/retry.js

@@ -0,0 +1,19 @@
+'use strict'
+const RetryHandler = require('../handler/retry-handler')
+
+module.exports = globalOpts => {
+  return dispatch => {
+    return function retryInterceptor (opts, handler) {
+      return dispatch(
+        opts,
+        new RetryHandler(
+          { ...opts, retryOptions: { ...globalOpts, ...opts.retryOptions } },
+          {
+            handler,
+            dispatch
+          }
+        )
+      )
+    }
+  }
+}