- 增加 ICodeFirst.IsGenerateCommandParameterWithLambda 选项，开启表达式解析的命令参数化；

- 增加 ExpressionCallContext 自定义函数上下文档 DbParameter 属性；
- 修复 IncludeMany(a => a.x1.x2.Childs) 当 x1, x2 为 null 的报 null 错误；

FreeSql/Internal/Model/ColumnInfo.cs

@@ -13,6 +13,10 @@ namespace FreeSql.Internal.Model
         public Type CsType { get; set; }
         public ColumnAttribute Attribute { get; set; }
         public string Comment { get; internal set; }
+        public string DbTypeText { get; internal set; }
+        public int DbSize { get; internal set; }
+        public byte DbPrecision { get; internal set; }
+        public byte DbScale { get; internal set; }
 
         static ConcurrentDictionary<ColumnInfo, Func<object, object>> _dicGetMapValue = new ConcurrentDictionary<ColumnInfo, Func<object, object>>();
         public object GetMapValue(object obj)