fix(api): gracefully handle integrity error on inbound record deletion

inventory-backend/app/services/inbound/buy_service.py

@@ -4,6 +4,7 @@ from app.models.inbound.buy import StockBuy
 from app.models.base import MaterialBase
 from datetime import datetime, timedelta, timezone
 from sqlalchemy import or_, func, text, and_
+from sqlalchemy.exc import IntegrityError
 import traceback
 import json
 
@@ -285,6 +286,9 @@ class BuyInboundService:
             db.session.delete(stock)
             db.session.commit()
             return material_name
+        except IntegrityError:
+            db.session.rollback()
+            raise ValueError("该入库单已被出库、盘点或借还等业务关联，为保证账目完整，禁止删除！")
         except Exception as e:
             db.session.rollback()
             raise e