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/node/override.js

@@ -0,0 +1,21 @@
+const diagnostics = require('./');
+
+//
+// Override the existing `debug` call so it will use `diagnostics` instead
+// of the `debug` module.
+//
+try {
+  var key = require.resolve('debug');
+
+  require.cache[key] = {
+    exports: diagnostics,
+    filename: key,
+    loaded: true,
+    id: key
+  };
+} catch (e) { /* We don't really care if it fails */ }
+
+//
+// Export the default import as exports again.
+//
+module.exports = diagnostics;