fix: [생산지시] withCount에서도 보조 공정(재고생산) WO 제외

- 목록 조회 시 work_orders_count에서 is_auxiliary WO 제외
- whereNotNull(process_id) + options->is_auxiliary 조건 추가

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/Services/ProductionOrderService.php

@@ -30,7 +30,9 @@ public function index(array $params): LengthAwarePaginator
             ->whereIn('status_code', self::PRODUCTION_STATUSES)
             ->with(['client', 'workOrders.process', 'workOrders.assignees.user'])
             ->withCount([
-                'workOrders' => fn ($q) => $q->whereNotNull('process_id'),
+                'workOrders' => fn ($q) => $q->whereNotNull('process_id')
+                    ->where(fn ($q2) => $q2->whereNull('options->is_auxiliary')
+                        ->orWhere('options->is_auxiliary', false)),
                 'nodes',
             ]);