feat: 增加分页排序与FluentValidation

src/Application/TakeoutSaaS.Application/App/Payments/Dto/PaymentDto.cs

@@ -71,4 +71,9 @@ public sealed class PaymentDto
     /// 退款记录。
     /// </summary>
     public IReadOnlyList<PaymentRefundDto> Refunds { get; init; } = Array.Empty<PaymentRefundDto>();
+
+    /// <summary>
+    /// 创建时间。
+    /// </summary>
+    public DateTime CreatedAt { get; init; }
 }