Fix POM file to use project.version for Bundle-Version and Export-Pac…

[latelespaul]

Refactor StdioClientTransport shutdown process for clarity and consistency

Motivation and Context

To fix warnings and potential bugs of Mono type mismatch.

How Has This Been Tested?

Ran all the tests after changes

Breaking Changes

NA

Types of changes

• [x ] 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

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

Additional context