fix: raise resource limits for synchronous pre-update backup (WSOD)

The pre-update/uninstall backup runs synchronously inside the extension
update request. Without raising limits, a large site exceeds
max_execution_time/memory_limit mid-backup and the update page
white-screens. Raise set_time_limit(0)/memory_limit/ignore_user_abort
like the web-cron path.

Claude-Session: https://claude.ai/code/session_01WbGBN9VyRK61zczYWcCQ2i

source/packages/plg_system_mokosuitebackup/src/Extension/MokoSuiteBackup.php

@@ -386,6 +386,16 @@ final class MokoSuiteBackup extends CMSPlugin implements SubscriberInterface
 
 		$profileId = (int) $params->get('default_profile', 1);
 
+		/* This backup runs synchronously inside the extension update/uninstall
+		   request. Without raising these limits a large site blows past
+		   max_execution_time / memory_limit mid-backup and the update page
+		   white-screens. Mirror the web-cron path. (Core Joomla updates are
+		   handled by the full-screen redirect instead — see onAfterRoute.) */
+		@set_time_limit(0);
+		@ini_set('max_execution_time', '0');
+		@ini_set('memory_limit', '512M');
+		@ignore_user_abort(true);
+
 		try {
 			$result = (new BackupRunner())->run($profileId, $description, 'preaction');
 			$app    = Factory::getApplication();