chore: 优化公告已读批量与用户维度

src/Infrastructure/TakeoutSaaS.Infrastructure/App/Repositories/EfTenantAnnouncementReadRepository.cs

@@ -20,6 +20,32 @@ public sealed class EfTenantAnnouncementReadRepository(TakeoutAppDbContext conte
             .ContinueWith(t => (IReadOnlyList<TenantAnnouncementRead>)t.Result, cancellationToken);
     }
 
+    public Task<IReadOnlyList<TenantAnnouncementRead>> GetByAnnouncementAsync(long tenantId, IEnumerable<long> announcementIds, long? userId, CancellationToken cancellationToken = default)
+    {
+        var ids = announcementIds.Distinct().ToArray();
+        if (ids.Length == 0)
+        {
+            return Task.FromResult<IReadOnlyList<TenantAnnouncementRead>>(Array.Empty<TenantAnnouncementRead>());
+        }
+
+        var query = context.TenantAnnouncementReads.AsNoTracking()
+            .Where(x => x.TenantId == tenantId && ids.Contains(x.AnnouncementId));
+
+        if (userId.HasValue)
+        {
+            query = query.Where(x => x.UserId == userId.Value);
+        }
+        else
+        {
+            query = query.Where(x => x.UserId == null);
+        }
+
+        return query
+            .OrderByDescending(x => x.ReadAt)
+            .ToListAsync(cancellationToken)
+            .ContinueWith(t => (IReadOnlyList<TenantAnnouncementRead>)t.Result, cancellationToken);
+    }
+
     public Task<TenantAnnouncementRead?> FindAsync(long tenantId, long announcementId, long? userId, CancellationToken cancellationToken = default)
     {
         return context.TenantAnnouncementReads