Please support MCP 2026-07-28 specification

[bunny-rich]

Is your feature request related to a problem? Please describe.
ChatGPT now rejects connections from this MCP implementation. It needs to be upgraded to support the latest specification 2026-07-28

Describe the solution you'd like
Please support MCP 2026-07-28.

https://blog.modelcontextprotocol.io/posts/2026-07-28-release-candidate/

Describe alternatives you've considered
No alternative.

Additional context

[koic]

Currently working on #382, #389, #390, and #391. Thank you for your patience.