Accept Merge Request #1573: (feature/坯料制造序号优化 -> develop)

Merge Request: 处理 坯料的制造订单生成的批次序列号不对 的bug

Created By: @禹翔辉
Reviewed By: @胡尧
Approved By: @胡尧 
Accepted By: @禹翔辉
URL: https://jikimo-hn.coding.net/p/jikimo_sfs/d/jikimo_sf/git/merge/1573

sf_manufacturing/models/stock.py

@@ -424,6 +424,8 @@ class ProductionLot(models.Model):
         """Generate `lot_names` from a string."""
         if first_lot.__contains__(display_name):
             first_lot = first_lot[(len(display_name) + 1):]
+        else:
+            first_lot = first_lot[-3:]
 
         # We look if the first lot contains at least one digit.
         caught_initial_number = regex_findall(r"\d+", first_lot)