fix 0018667: 【医生签约】已解约的签约合同，可多次点击续约，生成多条续约记录

src/VitalMixtureService/DBService/Entities/ContractRecordEntity.cs

@@ -110,5 +110,11 @@ namespace VitalService.Entities
         /// </summary>
         /// <value></value>
         public string PreceptorName { get; set; }
+
+        /// <summary>
+        /// 续签签约编码
+        /// </summary>
+        /// <value></value>
+        public string RenewalContractCode { get; set; }
     }
 }