[cyq1017]

Summary:\n- Align Streamable HTTP onclose declarations with Transport['onclose'].\n- Remove redundant onclose casts in the Node wrapper transport.\n- Add a typecheck-only fixture covering NodeStreamableHTTPServerTransport assignability to Transport and onclose = undefined.\n\nFixes #2083

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🦋 Changeset detected

Latest commit: 6693b49

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
@modelcontextprotocol/node	Patch
@modelcontextprotocol/server	Patch

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commit: 6693b49

[felixweinberger]

Thanks for the PR. On v2 the assignability problem was fixed by #1766, released in 2.0.0; v1 still has it, which is what #2083 reports. Closing.