MCPClient streamable_http transport support

[yousifa]

• added streamablehttp support
• bumped mcp version to 1.9.4 (to support streamablehttp)
• added additional_headers and streamable_http params to MCPClient

[vipyne]

thank you @yousifa !
do you have a favorite (accessible) mcp server that can be used to illustrate a streamablehttp connection ?
perhaps something we can add to examples/foundational/39-* ?

[vipyne]

Here is a branch with some proposed changes. Most deal with recent SSE changes on main. Can you rebase on main and add these changes to this PR @yousifa ?
Feel free to tag @vipyne with any questions.

[vipyne]

• remove auth=self._server_params.auth, lines
• add comment about GITHUB_PERSONAL_ACCESS_TOKEN

after that, lgtm!

edit: oh, I still want to take a closer look at the google stuff... could we make the llm in the example google to exercise those code paths? @yousifa

[yousifa]

@vipyne can we get this in before v0.0.72 👀🙏

[vipyne]

@vipyne can we get this in before v0.0.72 👀🙏

@yousifa can you rebase on latest main by any chance? just makes things a little cleaner.
now worries if not. reviewing now. will see re: release.

[vipyne]

so as I am looking at this, I think the google llm stuff is out of scope here. can you open a separate PR with just those changes? that way this PR & code changes are only about adding the streamable http client.

[yousifa]

sure will do now. I will change the example to be with openai then so it doesn't break

[vipyne]

hi @yousifa, I think something went sideways. can you try pulling latest main, then rebasing?

[vipyne]

feel free to ping @vipyne on discord and I can help.

[yousifa]

yep, i rebased on old main i think, working on it

[yousifa]

@vipyne should be good to go

[vipyne]

thank you for your patience! next time run ruff format but lgtm.