fix: Add docstring to MCP tool 'md' endpoint

[YuriNachos]

Summary

Fixes #1652

The get_markdown function in deploy/docker/server.py was missing a docstring, which caused the MCP tool 'md' to have no description when exposed via _list_tools().

List of files changed and why

• deploy/docker/server.py - Added docstring to get_markdown function to provide description for MCP tool listing

How Has This Been Tested?

The fix adds a docstring that is properly picked up by inspect.getdoc() in the _list_tools() function. The docstring describes:

• The tool's purpose (converting web pages to Markdown)
• Supported extraction modes (fit, raw, bm25, llm)
• Usage guidance for LLMs and developers

Checklist:

• My code follows the style guidelines of this project (follows existing docstring format in generate_html)
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (N/A - docstring is documentation)
• I have added/updated unit tests that prove my fix is effective or that my feature works (N/A - simple docstring addition)
• New and existing unit tests pass locally with my changes

🤖 Generated with Claude Code