docs: add S7 PLC simulator implementation plan

wanshenmean

2026-03-13 adf41ccad7f0abd082d899c390995a0a2e584044

 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; }
    }
}