统一AssignmentStatus字段类型，新建枚举，对应状态

QYZH.InteractiveMagazine.Models/Entity/JournalPageTaskUserAnswer.cs

@@ -231,6 +231,6 @@ namespace QYZH.InteractiveMagazine.Models.Entity
         /// Default:
         /// Nullable:True
         /// </summary>
-        public string AssignmentStatus { get; set; }
+        public int AssignmentStatus { get; set; }
     }
 }

QYZH.InteractiveMagazine.Models/Entity/JournalPageTaskUserAnswerSnapshot.cs

@@ -171,6 +171,6 @@ namespace QYZH.InteractiveMagazine.Models.Entity
         /// <summary>
         /// Assignment status.
         /// </summary>
-        public string? AssignmentStatus { get; set; }
+        public int? AssignmentStatus { get; set; }
     }
 }

QYZH.InteractiveMagazine.Models/Enum/AssignmentStatusEnum.cs

@@ -0,0 +1,22 @@
+using System.ComponentModel;
+
+namespace QYZH.InteractiveMagazine.Models.Enum
+{
+    /// <summary>
+    /// 作业分配审核状态枚举: 0-未审核 1-已审核
+    /// </summary>
+    public enum AssignmentStatusEnum
+    {
+        /// <summary>
+        /// 未审核
+        /// </summary>
+        [Description("未审核")]
+        UnAssignmented = 0,
+
+        /// <summary>
+        /// 已审核
+        /// </summary>
+        [Description("已审核")]
+        Assignmented = 1
+    }    
+}