​文档过大时，导出markdown提示失败，导出其他格式成功

[tangyuancat]

What happened?

文档大概2万字以上。

Distribution version

Windows x64

What browsers are you seeing the problem on if you're using web version?

No response

Are you self-hosting?

• [ ] Yes

Relevant log output

No response

Anything else?

No response

[affine-issue-bot[bot]]

Issue Status: 🆕 *Untriaged

*🆕 Untriaged

The team has not yet reviewed the issue. We usually do it within one business day. Docs: https://github.com/toeverything/AFFiNE/blob/canary/docs/issue-triaging.md

^{_{This is an automatic reply by the bot.}}

[fourdim]

Console log needed.

[fourdim]

Feel free to reopen this issue and provide detailed logs if this PR does not solve your issue.