docs: add xml comments for tenant modules

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

@@ -8,6 +8,13 @@ namespace TakeoutSaaS.Application.App.Tenants.Queries;
 /// </summary>
 public sealed record GetTenantAnnouncementQuery : IRequest<TenantAnnouncementDto?>
 {
+    /// <summary>
+    /// 租户 ID（雪花算法）。
+    /// </summary>
     public long TenantId { get; init; }
+
+    /// <summary>
+    /// 公告 ID。
+    /// </summary>
     public long AnnouncementId { get; init; }
 }