wip: 🧠 初步的框架

src/backend/NetAdmin.Domain/DbMaps/Dependency/ImmutableEntity.cs

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+using NetAdmin.Domain.Attributes;
+using NetAdmin.Domain.DbMaps.Dependency.Fields;
+
+namespace NetAdmin.Domain.DbMaps.Dependency;
+
+/// <summary>
+///     不可变实体
+/// </summary>
+public abstract record ImmutableEntity : ImmutableEntity<long>
+{
+    /// <summary>
+    ///     唯一编码
+    /// </summary>
+    [Snowflake]
+    [Column(IsIdentity = false, IsPrimary = true, Position = 1)]
+    public override long Id { get; init; }
+}
+
+/// <summary>
+///     不可变实体
+/// </summary>
+/// <typeparam name="T"></typeparam>
+public abstract record ImmutableEntity<T> : LiteImmutableEntity<T>, IFieldCreatedUser
+{
+    /// <summary>
+    ///     创建者编号
+    /// </summary>
+    [JsonIgnore]
+    [Column(CanUpdate = false, Position = -1)]
+    public long? CreatedUserId { get; init; }
+
+    /// <summary>
+    ///     创建者用户名
+    /// </summary>
+    [JsonIgnore]
+    [Column(DbType = Chars.FLG_DB_FIELD_TYPE_VARCHAR_31, CanUpdate = false, Position = -1)]
+    public virtual string CreatedUserName { get; set; }
+
+    /// <summary>
+    ///     唯一编码
+    /// </summary>
+    [Column(IsIdentity = false, IsPrimary = true, Position = 1)]
+    public override T Id { get; init; }
+}