增加定时任务，一个月清除一次无用文件

chenhj

2026-04-30 e7efe7784535a77a21347c0ca142056c16a94902

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

@@ -8,7 +8,7 @@
import com.ruoyi.purchase.vo.PurchaseReturnDetailsVo;
import com.ruoyi.purchase.vo.PurchaseReturnOrderVo;

import javax.validation.constraints.NotNull;
import jakarta.validation.constraints.NotNull;

/**
 * <p>