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

app/Services/Settlement/Matchers/Pos4ExactTierSettlementMatcher.php

@@ -2,12 +2,12 @@
 
 namespace App\Services\Settlement\Matchers;
 
-use App\Models\TicketCombination;
 use App\Models\TicketItem;
-use App\Services\Settlement\Contracts\SettlementPlayMatcher;
+use App\Models\TicketCombination;
+use Illuminate\Support\Collection;
 use App\Services\Settlement\OddsSnapshotReader;
 use App\Services\Settlement\PublishedDrawResultBoard;
-use Illuminate\Support\Collection;
+use App\Services\Settlement\Contracts\SettlementPlayMatcher;
 
 /** pos_4a / pos_4b / pos_4c：与对应档完整 4D 一致。 */
 final class Pos4ExactTierSettlementMatcher implements SettlementPlayMatcher