Revert "refactor: 清理租户API旧模块代码"

This reverts commit 992930a821.

src/Application/TakeoutSaaS.Application/App/Billings/Queries/GetOverdueBillingsQuery.cs

@@ -0,0 +1,21 @@
+using MediatR;
+using TakeoutSaaS.Application.App.Billings.Dto;
+using TakeoutSaaS.Shared.Abstractions.Results;
+
+namespace TakeoutSaaS.Application.App.Billings.Queries;
+
+/// <summary>
+/// 查询逾期账单列表。
+/// </summary>
+public sealed record GetOverdueBillingsQuery : IRequest<PagedResult<BillingListDto>>
+{
+    /// <summary>
+    /// 页码（从 1 开始）。
+    /// </summary>
+    public int PageNumber { get; init; } = 1;
+
+    /// <summary>
+    /// 每页条数。
+    /// </summary>
+    public int PageSize { get; init; } = 20;
+}