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

app/Services/Jackpot/JackpotBurstAllocator.php

@@ -2,11 +2,11 @@
 
 namespace App\Services\Jackpot;
 
-use App\Lottery\DrawStatus;
 use App\Models\Draw;
-use App\Models\JackpotPayoutLog;
-use App\Models\JackpotPool;
 use App\Models\TicketItem;
+use App\Lottery\DrawStatus;
+use App\Models\JackpotPool;
+use App\Models\JackpotPayoutLog;
 use Illuminate\Support\Collection;
 
 /**

app/Services/Jackpot/JackpotContributionService.php

@@ -3,9 +3,9 @@
 namespace App\Services\Jackpot;
 
 use App\Models\Draw;
-use App\Models\JackpotContribution;
-use App\Models\JackpotPool;
 use App\Models\TicketItem;
+use App\Models\JackpotPool;
+use App\Models\JackpotContribution;
 
 /**
  * 产品文档 §5.11.1：每笔有效注单按比例蓄水（在下注成功路径调用，非结算）。