优化cnc工单返工：在原有的cnc工单后新增返工标志的cnc工单，且工序累加，状态为就绪，解除装夹工单的状态为等待其他工单

sf_sale/models/quick_easy_order_old.py

@@ -6,8 +6,8 @@ import os
 from datetime import datetime
 from stl import mesh
 # from OCC.Core.GProp import GProp_GProps
-from OCC.Extend.DataExchange import read_step_file
-from OCC.Extend.DataExchange import write_stl_file
+# from OCC.Extend.DataExchange import read_step_file
+# from OCC.Extend.DataExchange import write_stl_file
 from odoo.addons.sf_base.commons.common import Common
 from odoo import models, fields, api
 from odoo.modules import get_resource_path