fix: improve FilePersistenceService code quality and security

wanshenmean

2026-03-13 efbfb630f60f6663deba83ec12c1fbf2f9bab183

 Code/WMS/WIDESEA_WMSServer/WIDESEA_DTO/Stock/StockDTO.cs

@@ -56,6 +56,6 @@
        /// <summary>
        /// 任务号
        /// </summary>
        public string TaskNum { get; set; }
        public int TaskNum { get; set; }
    }
}