mcp server: get session from exchange

[lambochen]

Motivation and Context

rel: #213

How Has This Been Tested?

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 Documentation
• My code follows the repository's style guidelines
• New and existing tests pass locally
• I have added appropriate error handling
• I have added or updated documentation as needed

Additional context

[tuzzmaniandevil]

This is exactly what I need to handle Authentication and the Sync server isn't actually Sync, It still runs things in a different thread for some silly reason. So I need to get the Session so I can get the user info for the authenticated MCP client

[MaxHoecker]

Hello, I need this for proper authentication in my service too. Is there any reason this hasn't been merged yet?

[chemicL]

Closing as duplicate of #153. Please contribute to the discussion in #129