## What changed
- Add `.nvmrc` pinning Node.js to `24.22.1` and raise the root package's minimum Node.js version to match.
- Use `.nvmrc` in repository checks, SDK CI, and npm packaging and publishing workflows.
- Update MCP conformance instructions to use the repository's pinned Node.js version.
GitOrigin-RevId: d864875e538de2b99df73e5a03fc870ce0f90cf0