Verify and test newly added cloud document and search engine integrations

[wzh1994]

Currently, these integrations have been added but have not been fully verified. We need to ensure that each module works correctly, fix any bugs, and add proper test cases for them.

Task List

• Verify Feishu integration (feishu.py)
• Verify OneDrive integration (onedrive.py)
• Verify Confluence integration (confluence.py)
• Verify Notion integration (notion.py)
• Verify Obsidian integration (obsidian.py)
• Verify Yuque integration (yuque.py)
• Verify S3 integration (s3.py)
• Verify GoogleSearch
• Verify TencentSearch
• Verify BingSearch
• Verify BochaSearch
• Verify StackOverflowSearch
• Verify SemanticScholarSearch
• Verify GoogleBooksSearch
• Verify ArxivSearch
• Verify WikipediaSearch
• Add unit/integration tests for all cloud document modules
• Add unit/integration tests for all search engine modules
• Fix any identified bugs during verification