feat(WEB): 절곡 자재투입 LOT 매핑 파이프라인 구현

- PrefixResolver: 제품코드×마감재질→LOT prefix 결정 + BD-XX-NN 코드 생성
- DynamicBomEntry DTO: dynamic_bom JSON 항목 타입 안전 관리
- BendingInfoBuilder 확장: build() 리턴 변경 + buildDynamicBomForItem() 추가
- OrderService: 작업지시 생성 시 per-item dynamic_bom 자동 저장
- WorkOrderService.getMaterials(): dynamic_bom 우선 체크 + N+1 배치 최적화
- WorkOrderService.registerMaterialInput(): work_order_item_id 분기 라우팅 통일
- 단위 테스트 58개 + 통합 테스트 6개 (64 tests / 293 assertions)

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

app/Services/OrderService.php

@@ -1336,9 +1336,9 @@ public function createProductionOrder(int $orderId, array $data)
                         ->values()
                         ->all();
 
-                    $bendingInfo = app(BendingInfoBuilder::class)->build($order, $processId, $nodeIds ?: null);
-                    if ($bendingInfo) {
-                        $workOrderOptions = ['bending_info' => $bendingInfo];
+                    $buildResult = app(BendingInfoBuilder::class)->build($order, $processId, $nodeIds ?: null);
+                    if ($buildResult) {
+                        $workOrderOptions = ['bending_info' => $buildResult['bending_info']];
                     }
                 }
 
@@ -1405,17 +1405,33 @@ public function createProductionOrder(int $orderId, array $data)
                         $slatInfo['joint_bar'] = (2 + (int) floor(((float) $woWidth - 500) / 1000)) * $qty;
                     }
 
+                    $woHeight = $nodeOptions['height'] ?? $nodeOptions['open_height'] ?? null;
+
                     $woItemOptions = array_filter([
                         'floor' => $orderItem->floor_code,
                         'code' => $orderItem->symbol_code,
                         'width' => $woWidth,
-                        'height' => $nodeOptions['height'] ?? $nodeOptions['open_height'] ?? null,
+                        'height' => $woHeight,
                         'cutting_info' => $nodeOptions['cutting_info'] ?? null,
                         'slat_info' => $slatInfo,
                         'bending_info' => $nodeOptions['bending_info'] ?? null,
                         'wip_info' => $nodeOptions['wip_info'] ?? null,
                     ], fn ($v) => $v !== null);
 
+                    // 절곡 공정: 개소별 dynamic_bom 생성
+                    if (! empty($buildResult['context']) && $woWidth && $woHeight) {
+                        $dynamicBom = app(BendingInfoBuilder::class)->buildDynamicBomForItem(
+                            $buildResult['context'],
+                            (int) $woWidth,
+                            (int) $woHeight,
+                            (int) ($orderItem->quantity ?? 1),
+                            $tenantId,
+                        );
+                        if (! empty($dynamicBom)) {
+                            $woItemOptions['dynamic_bom'] = $dynamicBom;
+                        }
+                    }
+
                     DB::table('work_order_items')->insert([
                         'tenant_id' => $tenantId,
                         'work_order_id' => $workOrder->id,