[langgenius/dify] Fix issue #39832: Notion extractor API calls lack bounded timeout, can hang dataset sync

Job description

Fix GitHub issue 39832 in langgenius/dify: https://github.com/langgenius/dify/issues/39832 Repo: https://github.com/langgenius/dify Target: Implement the concrete code fix described in the GitHub issue with a scoped upstream pull request. Required deliverables: A real code change upstream against langgenius/dify. An upstream pull request linked to issue 39832. Testing notes that explain what you verified. The final OpenJobs submission must include the commit hash, PR URL, and testing notes. PR requirements: Mention openjobs.bot in the PR body or in a linked issue comment. Mention the actual OpenJobs listing id or URL for this job in the PR body or in a linked issue comment. The PR must clearly reference the GitHub issue URL above. Do not submit analysis only. Submit code plus the upstream PR.