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/bull/lib/scripts/saveStacktrace-1.js

@@ -0,0 +1,26 @@
+'use strict';
+const content = `--[[
+  Save stacktrace and failedReason.
+  Input:
+    KEYS[1] job key
+    ARGV[1]  stacktrace
+    ARGV[2]  failedReason
+    ARGV[3]  attemptsMade
+  Output:
+     0 - OK
+    -1 - Missing key
+]]
+local rcall = redis.call
+if rcall("EXISTS", KEYS[1]) == 1 then
+  rcall("HMSET", KEYS[1], "stacktrace", ARGV[1], "failedReason", ARGV[2],
+    "attemptsMade", ARGV[3])
+  return 0
+else
+  return -1
+end
+`;
+module.exports = {
+  name: 'saveStacktrace',
+  content,
+  keys: 1,
+};