feat: [production] 자재투입 replace 모드 지원

- registerMaterialInputForItem에 replace 파라미터 추가
- 기존 투입 교체 방식 선택 가능

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

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

@@ -320,7 +320,14 @@ public function materialsForItem(int $id, int $itemId)
     public function registerMaterialInputForItem(MaterialInputForItemRequest $request, int $id, int $itemId)
     {
         return ApiResponse::handle(function () use ($request, $id, $itemId) {
-            return $this->service->registerMaterialInputForItem($id, $itemId, $request->validated()['inputs']);
+            $validated = $request->validated();
+
+            return $this->service->registerMaterialInputForItem(
+                $id,
+                $itemId,
+                $validated['inputs'],
+                (bool) ($validated['replace'] ?? false)
+            );
         }, __('message.work_order.material_input_registered'));
     }