Feeds that all entries those has same updateAt from RSSHub cause infinite request

See records, eg.`rsshub://hellogithub/volume` https://github.com/user-attachments/assets/6dc3f8be-1460-46af-bb47-d82cab8d66de Found that while the condition here causes an infinite loop, don't know why sub 1 min here, so open this issue https://github.com/hyoban/follow-app/blob/992ae3f5cb81dcf627b321b9bf057bbcf9c499d0/api/entry.ts#L100