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/commands/extendLock-2.lua

@@ -0,0 +1,22 @@
+--[[
+  Extend lock and removes the job from the stalled set.
+
+  Input:
+    KEYS[1] 'lock',
+    KEYS[2] 'stalled'
+
+    ARGV[1]  token
+    ARGV[2]  lock duration in milliseconds
+    ARGV[3]  jobid
+
+  Output:
+    "1" if lock extended succesfully.
+]]
+local rcall = redis.call
+if rcall("GET", KEYS[1]) == ARGV[1] then
+  if rcall("SET", KEYS[1], ARGV[1], "PX", ARGV[2]) then
+    rcall("SREM", KEYS[2], ARGV[3])
+    return 1
+  end
+end
+return 0