Deprecate `httpx` in favor of `httpx2` - #2693

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dsfaccini wants to merge 6 commits into

modelcontextprotocol:mainfrom

dsfaccini:httpx2-deprecation

Commits on May 26, 2026

Deprecate `httpx` in favor of `httpx2`
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fe8afee
Apply ruff-format
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faa5298
Correct framing: `httpx2` is on PyPI; CI exercises the fallback because the lockfile pins `httpx`
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786ee07
Simplify shim per @Kludex: emit warning at module import, drop the lazy helper
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3de2aa1
Move MCPDeprecationWarning to mcp.shared.exceptions per @Kludex review
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240b701
Mirror Starlette docstring; rewrite shim tests in logfire's reload+patch.dict style
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0ccc72d