Import backup keyboard for SLA handlers

handlers/system.py

@@ -14,6 +14,7 @@ from keyboards import (
     system_logs_kb,
     openwrt_kb,
     docker_kb,
+    backup_kb,
 )
 from system_checks import security, disks, hardware, list_disks, smart_last_test
 from services.http_checks import get_url_checks, check_url