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-master-api/node_modules/pg-protocol/dist/buffer-reader.d.ts

@@ -0,0 +1,14 @@
+export declare class BufferReader {
+    private offset;
+    private buffer;
+    private encoding;
+    constructor(offset?: number);
+    setBuffer(offset: number, buffer: Buffer): void;
+    int16(): number;
+    byte(): number;
+    int32(): number;
+    uint32(): number;
+    string(length: number): string;
+    cstring(): string;
+    bytes(length: number): Buffer;
+}