feat(stock): 添加通过ID查询库存功能

liyong

2026-02-03 16c4741366fb54867febe7528fcc72e1e49b6482

 src/main/java/com/ruoyi/purchase/service/IPurchaseLedgerService.java

@@ -43,4 +43,6 @@
    String getPurchaseNo();

    AjaxResult importData(MultipartFile file);

    PurchaseLedgerDto getPurchaseByCode(PurchaseLedgerDto purchaseLedgerDto);
}