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/jake/test/integration/concurrent.js

@@ -0,0 +1,45 @@
+let assert = require('assert');
+let exec = require('child_process').execSync;
+
+const PROJECT_DIR = process.env.PROJECT_DIR;
+const JAKE_CMD = `${PROJECT_DIR}/bin/cli.js`;
+
+suite('concurrent', function () {
+
+  this.timeout(7000);
+
+  test(' simple concurrent prerequisites 1', function () {
+    let out = exec(`${JAKE_CMD} -q concurrent:simple1`).toString().trim();
+    assert.equal('Started A\nStarted B\nFinished B\nFinished A', out);
+  });
+
+  test(' simple concurrent prerequisites 2', function () {
+    let out = exec(`${JAKE_CMD} -q concurrent:simple2`).toString().trim();
+    assert.equal('Started C\nStarted D\nFinished C\nFinished D', out);
+  });
+
+  test(' sequential concurrent prerequisites', function () {
+    let out = exec(`${JAKE_CMD} -q concurrent:seqconcurrent`).toString().trim();
+    assert.equal('Started A\nStarted B\nFinished B\nFinished A\nStarted C\nStarted D\nFinished C\nFinished D', out);
+  });
+
+  test(' concurrent concurrent prerequisites', function () {
+    let out = exec(`${JAKE_CMD} -q concurrent:concurrentconcurrent`).toString().trim();
+    assert.equal('Started A\nStarted B\nStarted C\nStarted D\nFinished B\nFinished C\nFinished A\nFinished D', out);
+  });
+
+  test(' concurrent prerequisites with subdependency', function () {
+    let out = exec(`${JAKE_CMD} -q concurrent:subdep`).toString().trim();
+    assert.equal('Started A\nFinished A\nStarted Ba\nFinished Ba', out);
+  });
+
+  test(' failing in concurrent prerequisites', function () {
+    try {
+      exec(`${JAKE_CMD} -q concurrent:Cfail`);
+    }
+    catch(err) {
+      assert(err.message.indexOf('Command failed') > -1);
+    }
+  });
+
+});