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/express-validator/lib/context-items/chain-condition.js

@@ -0,0 +1,16 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.ChainCondition = void 0;
+const base_1 = require("../base");
+class ChainCondition {
+    constructor(chain) {
+        this.chain = chain;
+    }
+    async run(_context, _value, meta) {
+        const result = await this.chain.run(meta.req, { dryRun: true });
+        if (!result.isEmpty()) {
+            throw new base_1.ValidationHalt();
+        }
+    }
+}
+exports.ChainCondition = ChainCondition;