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/includes/removeLock.lua

@@ -0,0 +1,19 @@
+local function removeLock(jobKey, stalledKey, token, jobId)
+  if token ~= "0" then
+    local lockKey = jobKey .. ':lock'
+    local lockToken = rcall("GET", lockKey)
+    if lockToken == token then
+      rcall("DEL", lockKey)
+      rcall("SREM", stalledKey, jobId)
+    else
+      if lockToken then
+        -- Lock exists but token does not match
+        return -6
+      else
+        -- Lock is missing completely
+        return -2
+      end
+    end
+  end
+  return 0
+end