Add guest push notifications and queue alerts

.env.example

@@ -138,4 +138,19 @@ COOLIFY_WEB_URL=
 COOLIFY_API_TIMEOUT=5
 COOLIFY_SERVICE_IDS={"app":"svc_app","queue":"svc_queue","scheduler":"svc_scheduler","ftp":"svc_ftp","control":"svc_control"}
 
+GUEST_ACHIEVEMENT_MILESTONES=10,25,50
+
+# Push notifications
+PUSH_ENABLED=false
+PUSH_VAPID_PUBLIC_KEY=
+PUSH_VAPID_PRIVATE_KEY=
+PUSH_VAPID_SUBJECT="mailto:hello@example.com"
+
+# Storage queue guest alert tuning
+STORAGE_QUEUE_PENDING_EVENT_THRESHOLD=5
+STORAGE_QUEUE_PENDING_EVENT_MINUTES=8
+STORAGE_QUEUE_FAILED_EVENT_THRESHOLD=2
+STORAGE_QUEUE_FAILED_EVENT_MINUTES=30
+STORAGE_QUEUE_GUEST_ALERT_TTL=30
+