feat(borrow,outbound): 默认免审批改造——命中物料需审批才走原流程

- models/base.py 加 is_approval_required 列及 isApprovalRequired 序列化；field_permissions 登记
- 新增 POST /inbound/base/batch-approval（批量设需审批，仿批量质检）
- borrow_service.submit_approval / outbound_service.create_request：明细含需审批物料→须选审批人走原审批；否则创建即 status=1(待库管执行)、不发审批邮件
- 判定按 (name,spec_model) 反查启用物料

inventory-backend/app/utils/field_permissions.py

@@ -14,6 +14,7 @@ STOCK_FIELD_RBAC_MAPPING = {
         "category": "material_list:category", "type": "material_list:type",
         "spec": "material_list:spec", "unit": "material_list:unit",
         "companyName": "material_list:companyName", "isInspectionRequired": "material_list:isInspectionRequired",
+        "isApprovalRequired": "material_list:operation",
         "generalImage": "material_list:files", "generalManual": "material_list:files",
         "productImageRemark": "material_list:productImageRemark",
         "manualLinkRemark": "material_list:manualLinkRemark",