refactor(工单日志): 修改工单日志接口返回类型并优化实现

将WorkOrderLog方法的返回类型从int改为List<ProWorkorderUpdateLog>，并实现查询工单变更日志功能

DOAN.Service/MES/Product/ProWorkorderUtilityService.cs

@@ -9,7 +9,10 @@ namespace DOAN.Service.MES.product
     /// <summary>
     /// 工单工具服务
     /// </summary>
-    [AppService(ServiceType = typeof(IProWorkorderUtilityService), ServiceLifetime = LifeTime.Transient)]
+    [AppService(
+        ServiceType = typeof(IProWorkorderUtilityService),
+        ServiceLifetime = LifeTime.Transient
+    )]
     public class ProWorkorderUtilityService : BaseService<ProWorkorder>, IProWorkorderUtilityService
     {
         /// <summary>
@@ -109,17 +112,20 @@ namespace DOAN.Service.MES.product
         }
 
         /// <summary>
-        /// 工单日志
+        /// 工单变更日志
         /// </summary>
         /// <param name="workorder"></param>
         /// <param name="log"></param>
         /// <param name="Operator"></param>
         /// <returns></returns>
-        public int WorkOrderLog(string workorder, string log, string Operator)
+        public List<ProWorkorderUpdateLog> WorkOrderLog(string workorder)
         {
-            // 这里需要实现工单日志记录逻辑
-            // 暂时返回成功
-            return 1;
+            var result = Context
+                .Queryable<ProWorkorderUpdateLog>()
+                .Where(it => it.Workorder == workorder)
+                .OrderByDescending(it => it.ChangeTime)
+                .ToList();
+            return result;
         }
 
         /// <summary>