fix: sqlite migration drops allowed user groups

backend/resources/migrations/sqlite/20250225182112_manual_smtp_tls_selection.up.sql

@@ -1,7 +1,11 @@
+PRAGMA foreign_keys=OFF;
+BEGIN;
 UPDATE app_config_variables
 SET value = CASE
                 WHEN value = 'true' AND (SELECT value FROM app_config_variables WHERE key = 'smtpPort' LIMIT 1) = '587' THEN 'starttls'
                 WHEN value = 'true' THEN 'tls'
                 ELSE 'none'
     END
-WHERE key = 'smtpTls';
+WHERE key = 'smtpTls';
+COMMIT;
+PRAGMA foreign_keys=ON;