feat(credit): 实时同步代理已用额度，覆盖玩家下注/结算全流程

- PlayerCreditService 在下注占用、输赢结算、撤单释放等关键节点触发 AgentUsedCreditSyncService
- AgentProfileService::present 与 AgentDashboardOverviewBuilder 查询前主动同步 used_credit
- 确保代理链 used_credit（团队已用风险）实时反映下级玩家信用占用状态

app/Services/Agent/AgentProfileService.php

@@ -17,6 +17,7 @@ final class AgentProfileService
         private readonly CreditAllocationValidator $creditAllocationValidator,
         private readonly RebateLimitValidator $rebateLimitValidator,
         private readonly AgentCreditAllocatedSyncService $allocatedSync,
+        private readonly AgentUsedCreditSyncService $usedCreditSync,
     ) {}
 
     /**
@@ -132,6 +133,7 @@ final class AgentProfileService
     public function present(AgentProfile $profile): array
     {
         $this->allocatedSync->syncForAgentId((int) $profile->agent_node_id);
+        $this->usedCreditSync->syncForAgentId((int) $profile->agent_node_id);
         $profile->refresh();
 
         $available = max(0, (int) $profile->credit_limit - (int) $profile->allocated_credit);