refactor: 将广播事件改为异步队列并增强索引检查兼容性

app/Events/BalanceUpdateBroadcast.php

@@ -6,7 +6,7 @@ use Illuminate\Broadcasting\Channel;
 use Illuminate\Queue\SerializesModels;
 use Illuminate\Foundation\Events\Dispatchable;
 use Illuminate\Broadcasting\InteractsWithSockets;
-use Illuminate\Contracts\Broadcasting\ShouldBroadcastNow;
+use Illuminate\Contracts\Broadcasting\ShouldBroadcast;
 
 /**
  * 界面文档 §2.1：`balance.update` —— 钱包余额变动推送。
@@ -14,10 +14,19 @@ use Illuminate\Contracts\Broadcasting\ShouldBroadcastNow;
  * 触发时机：转入/转出/下注/派彩等导致余额变动时。
  * 前端处理：更新余额显示 + Toast 提示。
  */
-final class BalanceUpdateBroadcast implements ShouldBroadcastNow
+final class BalanceUpdateBroadcast implements ShouldBroadcast
 {
     use Dispatchable, InteractsWithSockets, SerializesModels;
 
+    /** 异步广播队列 */
+    public string $queue = 'broadcasts';
+
+    /** 最多重试 3 次 */
+    public int $tries = 3;
+
+    /** 单任务超时 10 秒 */
+    public int $timeout = 10;
+
     /**
      * @param  int  $playerId  玩家 ID（用于频道隔离）
      * @param  string  $currencyCode  币种代码