[feat] User notifications backend (#3280)

Co-authored-by: Arc <33088785+arcbtc@users.noreply.github.com>
Co-authored-by: dni ⚡ <office@dnilabs.com>

lnbits/app.py

@@ -27,7 +27,7 @@ from lnbits.core.crud.extensions import create_installed_extension
 from lnbits.core.helpers import migrate_extension_database
 from lnbits.core.models.notifications import NotificationType
 from lnbits.core.services.extensions import deactivate_extension, get_valid_extensions
-from lnbits.core.services.notifications import enqueue_notification
+from lnbits.core.services.notifications import enqueue_admin_notification
 from lnbits.core.services.payments import check_pending_payments
 from lnbits.core.tasks import (
     audit_queue,
@@ -104,7 +104,7 @@ async def startup(app: FastAPI):
     # initialize tasks
     register_async_tasks()
 
-    enqueue_notification(
+    enqueue_admin_notification(
         NotificationType.server_start_stop,
         {
             "message": "LNbits server started.",
@@ -118,7 +118,7 @@ async def startup(app: FastAPI):
 
 async def shutdown():
     logger.warning("LNbits shutting down...")
-    enqueue_notification(
+    enqueue_admin_notification(
         NotificationType.server_start_stop,
         {
             "message": "LNbits server shutting down...",