Add official DataHub MCP server

[hsheth2]

Description

Adds the official datahub mcp server. See

• https://datahub.com/
• https://github.com/datahub-project/datahub
• https://github.com/acryldata/mcp-server-datahub

Since it's release last month, it's had ~1k downloads on PyPI: https://pypistats.org/packages/mcp-server-datahub

Motivation and Context

See above.

How Has This Been Tested?

This has been tested with Claude Desktop, Cursor, and Goose.

Breaking Changes

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have read the MCP Protocol Documentation
• My changes follows MCP security best practices
• I have updated the server's README accordingly
• I have tested this with an LLM client
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have documented all environment variables and configuration options

Additional context

[hsheth2]

@olaservo is there anything else I should change to get this merged?

[hsheth2]

@alexhancock could you approve again? I needed to resolve a merge conflict.