feat: 租户账单公告通知接口

src/Application/TakeoutSaaS.Application/App/Tenants/Queries/GetTenantAnnouncementQuery.cs

@@ -0,0 +1,13 @@
+using MediatR;
+using TakeoutSaaS.Application.App.Tenants.Dto;
+
+namespace TakeoutSaaS.Application.App.Tenants.Queries;
+
+/// <summary>
+/// 公告详情查询。
+/// </summary>
+public sealed record GetTenantAnnouncementQuery : IRequest<TenantAnnouncementDto?>
+{
+    public long TenantId { get; init; }
+    public long AnnouncementId { get; init; }
+}