修复监控记录原始时间，提高整体项目兼容性

lixiaojun

2022-11-30 eab37249501e3b10181f60d237995e17d2d52491

 Entity/IStation.Entity.Run/monitor_record/MonitorYearRecord.cs

@@ -78,12 +78,12 @@
        /// <summary>
        /// 原始时间
        /// </summary>   
        public DateTime? SrcTime
        public DateTime SrcTime
        {
            get { return _srctime; }
            set { _srctime = value; }
        }
        private DateTime? _srctime;
        private DateTime _srctime;

        /// <summary>
        /// 原始值