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/Risk/AdminRiskPoolIndexController.php

@@ -2,13 +2,13 @@
 
 namespace App\Http\Controllers\Api\V1\Admin\Risk;
 
-use App\Http\Controllers\Controller;
 use App\Models\Draw;
 use App\Models\RiskPool;
-use App\Support\AdminApiList;
-use Illuminate\Contracts\Pagination\LengthAwarePaginator;
-use Illuminate\Http\JsonResponse;
 use Illuminate\Http\Request;
+use App\Support\AdminApiList;
+use Illuminate\Http\JsonResponse;
+use App\Http\Controllers\Controller;
+use Illuminate\Contracts\Pagination\LengthAwarePaginator;
 
 /**
  * GET /api/v1/admin/draws/{draw}/risk-pools — 按期号分页查询赔付池事实（售罄筛选、排序）。