[feat] support get session

[Aias00]

link: #129

when i need to get session info form call method. i need to do this:

which is verbose

Motivation and Context

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

[Aias00]

@tzolov Hello, sorry to bother you, could you help me review this PR?

[chemicL]

Please check my comment. As it is not a goal to leak the internal session to the user, let's discuss how to best address the needs by providing a safe API and an interception point.