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/pg-hstore/README.md

@@ -0,0 +1,37 @@
+[![Build Status](https://travis-ci.org/scarney81/pg-hstore.png)](https://travis-ci.org/[YOUR_GITHUB_USERNAME]/[YOUR_PROJECT_NAME])
+
+pg-hstore
+===========
+
+A node package for serializing and deserializing JSON data to hstore format
+
+## Install pg-hstore
+
+```bash
+$ npm install pg-hstore
+```
+
+## Usage
+### stringify
+
+```javascript
+var hstore = require('pg-hstore')();
+var source = { foo: "oof", bar: "rab", baz: "zab" };
+hstore.stringify(source, function(result) {
+  ...
+  // result = '"foo"=>"oof", "bar"=>"rab", "baz"=>"zab"'
+  ...
+});
+```
+
+### parse
+
+```javascript
+var hstore = require('pg-hstore')();
+var source = '"foo"=>"oof", "bar"=>"rab", "baz"=>"zab"';
+hstore.parse(source, function(result) {
+  ...
+  // result = { foo: "oof", bar: "rab", baz: "zab" } 
+  ...
+});
+```