docs: 完善参数注释与StyleCop配置

src/Domain/TakeoutSaaS.Domain/Tenants/Repositories/ITenantAnnouncementRepository.cs

@@ -1,6 +1,3 @@
-using System.Collections.Generic;
-using System.Threading;
-using System.Threading.Tasks;
 using TakeoutSaaS.Domain.Tenants.Entities;
 using TakeoutSaaS.Domain.Tenants.Enums;
 
@@ -41,6 +38,7 @@ public interface ITenantAnnouncementRepository
     /// </summary>
     /// <param name="announcement">公告实体。</param>
     /// <param name="cancellationToken">取消标记。</param>
+    /// <returns>异步任务。</returns>
     Task AddAsync(TenantAnnouncement announcement, CancellationToken cancellationToken = default);
 
     /// <summary>
@@ -48,6 +46,7 @@ public interface ITenantAnnouncementRepository
     /// </summary>
     /// <param name="announcement">公告实体。</param>
     /// <param name="cancellationToken">取消标记。</param>
+    /// <returns>异步任务。</returns>
     Task UpdateAsync(TenantAnnouncement announcement, CancellationToken cancellationToken = default);
 
     /// <summary>
@@ -56,11 +55,13 @@ public interface ITenantAnnouncementRepository
     /// <param name="tenantId">租户 ID。</param>
     /// <param name="announcementId">公告 ID。</param>
     /// <param name="cancellationToken">取消标记。</param>
+    /// <returns>异步任务。</returns>
     Task DeleteAsync(long tenantId, long announcementId, CancellationToken cancellationToken = default);
 
     /// <summary>
     /// 保存变更。
     /// </summary>
     /// <param name="cancellationToken">取消标记。</param>
+    /// <returns>异步任务。</returns>
     Task SaveChangesAsync(CancellationToken cancellationToken = default);
 }