feat(api): 新增节点月流量限额强制下线

新增节点级月流量限额配置、重置调度和运行状态持久化
下发 traffic_limit 给 mi-node，并在超额后停止内核、到期后恢复
管理端支持编辑限额参数并展示额度进度、状态和下次重置
手动与定时重置会同步清理限额状态并通知节点刷新配置

app/Console/Kernel.php

@@ -46,6 +46,7 @@ class Kernel extends ConsoleKernel
         $schedule->command('cleanup:online-status')->everyFiveMinutes()->onOneServer();
         $schedule->command('sync:server-auto-online')->everyFiveMinutes()->onOneServer()->withoutOverlapping(5);
         $schedule->command('sync:server-gfw-checks')->everyThirtyMinutes()->onOneServer()->withoutOverlapping(30);
+        $schedule->command('sync:server-traffic-limits')->everyMinute()->onOneServer()->withoutOverlapping(10);
         // backup Timing
         // if (env('ENABLE_AUTO_BACKUP_AND_UPDATE', false)) {
         //     $schedule->command('backup:database', ['true'])->daily()->onOneServer();