fix: 修复采购订单新增修改，报错

yuan

2026-07-15 e9fb84276805a01d6e665bc04b0999c842433d55

 src/main/java/com/ruoyi/purchase/controller/PurchaseReturnOrdersController.java

@@ -61,6 +61,7 @@
        return AjaxResult.success(purchaseReturnOrdersService.getPurchaseReturnOrderDtoById(id));
    }

    @Log(title = "采购退货单", businessType = BusinessType.DELETE)
    @PostMapping("/deleteById/{id}")
    public AjaxResult deleteById(@PathVariable Long id) {
        //如果该采购退货已经生成对账单则无法删除