fix：null required（at save parameter maps）

src/InterfaceForward.Application.Contracts/Dtos/Interface/SaveParameterMapsInput.cs

@@ -2,19 +2,15 @@
 
 public class SaveParameterMapsInput
 {
-    public SaveParameterMapsInput()
-    {
-        InParaMapList = new();
-    }
     /// <summary>
     /// 入参映射列表
     /// </summary>
-    public List<MapItem> InParaMapList { get; set; }
+    public List<MapItem> InParaMapList { get; set; } = new();
 
     /// <summary>
     /// 出参映射明细
     /// </summary>
-    public List<InterfaceMapDetail> MapDetails { get; set; }
+    public List<InterfaceMapDetail> MapDetails { get; set; } = new();
 }
 
 public class MapItem
@@ -32,12 +28,12 @@ public class MapItem
     /// <summary>
     /// 前置脚本
     /// </summary>
-    public string PrefixScript { get; set; }
+    public string? PrefixScript { get; set; }
     
     /// <summary>
     /// 后置脚本
     /// </summary>
-    public string PostfixScript { get; set; }
+    public string? PostfixScript { get; set; }
     
     /// <summary>
     /// 自由映射（支持不对等映射）
@@ -47,7 +43,7 @@ public class MapItem
     /// <summary>
     /// 入参映射明细
     /// </summary>
-    public List<InterfaceMapDetail> MapDetails { get; set; }
+    public List<InterfaceMapDetail> MapDetails { get; set; } = new();
 }
 
 public class InterfaceMapDetail
@@ -60,17 +56,17 @@ public class InterfaceMapDetail
     /// <summary>
     /// 【固定参数专用】固定参数值
     /// </summary>
-    public string FixedValue { get; set; }
+    public string? FixedValue { get; set; }
 
     /// <summary>
     /// 【固定参数专用】服务商参数别名  xxx.xxx
     /// </summary>
-    public string Alias { get; set; }
+    public string? Alias { get; set; }
 
     ///<summary>
     /// 【固定参数专用】服务商参数描述
     ///</summary>
-    public string Description { get; set; }
+    public string? Description { get; set; }
     
     /// <summary>
     /// 是否必填