refactor：拆分 API 路由与请求校验，统一 final 类和代码风格

app/Http/Controllers/Api/V1/Admin/Draw/DrawSettlementRunController.php

@@ -2,14 +2,14 @@
 
 namespace App\Http\Controllers\Api\V1\Admin\Draw;
 
-use App\Http\Controllers\Controller;
-use App\Lottery\ErrorCode;
-use App\Models\AdminUser;
 use App\Models\Draw;
-use App\Services\Settlement\SettlementOrchestrator;
+use App\Models\AdminUser;
+use App\Lottery\ErrorCode;
 use App\Support\ApiResponse;
-use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
+use Illuminate\Http\JsonResponse;
+use App\Http\Controllers\Controller;
+use App\Services\Settlement\SettlementOrchestrator;
 
 /**
  * POST /api/v1/admin/draws/{draw}/settlement/run — 对 `settling` 期号执行结算（可关自动结算时手工触发）。