feat: 完成ai-hub第一期功能

Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Domain/Entities/UsageStatisticsAggregateRoot.cs

@@ -0,0 +1,31 @@
+using SqlSugar;
+using Volo.Abp.Domain.Entities.Auditing;
+
+namespace Yi.Framework.AiHub.Domain.Entities;
+
+/// <summary>
+/// 用量统计
+/// </summary>
+[SugarTable("Ai_UsageStatistics")]
+public class UsageStatisticsAggregateRoot : FullAuditedAggregateRoot<Guid>
+{
+    /// <summary>
+    /// 用户id
+    /// </summary>
+    public Guid UserId { get; set; }
+
+    /// <summary>
+    /// 哪个模型
+    /// </summary>
+    public string ModelId { get; set; }
+
+    /// <summary>
+    /// 总token使用
+    /// </summary>
+    public decimal TotalTokens { get; set; }
+
+    /// <summary>
+    /// 对话次数
+    /// </summary>
+    public int Number { get; set; }
+}