fix: [subscription] 내보내기 stuck 문제 해결 - 동기 처리로 전환

- pending 상태로 영원히 남던 DataExport 문제 수정
- 미구현 비동기 Job 대신 ExportService::store() 동기 처리
- 5분 이상 stuck된 export 자동 만료 처리
- 파일 다운로드 엔드포인트 추가 (GET /export/{id}/download)

app/Http/Controllers/Api/V1/SubscriptionController.php

@@ -8,13 +8,17 @@
 use App\Http\Requests\V1\Subscription\SubscriptionCancelRequest;
 use App\Http\Requests\V1\Subscription\SubscriptionIndexRequest;
 use App\Http\Requests\V1\Subscription\SubscriptionStoreRequest;
+use App\Services\ExportService;
 use App\Services\SubscriptionService;
 use Illuminate\Http\JsonResponse;
+use Symfony\Component\HttpFoundation\BinaryFileResponse;
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 
 class SubscriptionController extends Controller
 {
     public function __construct(
-        private readonly SubscriptionService $subscriptionService
+        private readonly SubscriptionService $subscriptionService,
+        private readonly ExportService $exportService
     ) {}
 
     /**
@@ -117,12 +121,12 @@ public function usage(): JsonResponse
     }
 
     /**
-     * 내보내기 요청
+     * 내보내기 요청 (동기 처리)
      */
     public function export(ExportStoreRequest $request): JsonResponse
     {
         return ApiResponse::handle(
-            fn () => $this->subscriptionService->createExport($request->validated()),
+            fn () => $this->subscriptionService->createExport($request->validated(), $this->exportService),
             __('message.export.requested')
         );
     }
@@ -137,4 +141,24 @@ public function exportStatus(int $id): JsonResponse
             __('message.fetched')
         );
     }
+
+    /**
+     * 내보내기 파일 다운로드
+     */
+    public function exportDownload(int $id): BinaryFileResponse
+    {
+        $export = $this->subscriptionService->getExport($id);
+
+        if (! $export->is_downloadable) {
+            throw new NotFoundHttpException(__('error.export.not_found'));
+        }
+
+        $filePath = storage_path('app/'.$export->file_path);
+
+        if (! file_exists($filePath)) {
+            throw new NotFoundHttpException(__('error.export.not_found'));
+        }
+
+        return response()->download($filePath, $export->file_name);
+    }
 }