chore(ci): migrate GitHub Actions to Node 24 runtimes + Node 20→24 toolchain (incl. #9141)#9424

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ccastrotrejo wants to merge 9 commits into

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ccastrotrejo-microsoft-node20-actions-migration-research

Commits on Jul 17, 2026

chore: upgrade actions/setup-node from v1 to v4 in all workflows

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chore: update Node.js from 20 to 24 across CI, packages, and extension

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ci: bump first-party actions to Node24 runtimes (checkout v5, setup-node v5, cache v5, upload-artifact v6, download-artifact v7, github-script v8, pnpm/action-setup v5)

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ci: bump remaining actions to Node24 (stale v10, changed-files v47, add-and-commit v10, get-previous-tag v2, azure/login v3, setup-python v6, setup-dotnet v5, codeql v4)

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Merge remote-tracking branch 'origin/main' into ccastrotrejo-microsoft-node20-actions-migration-research
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ci: disable setup-node package-manager-cache where pnpm installs after

ccastrotrejo
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ci: drop pnpm/action-setup version input (use packageManager)

ccastrotrejo
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test(a2a-core): run http-client tests in node env for Node 24 undici realm

ccastrotrejo
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test(e2e): use import attributes (with) instead of assert for JSON imports

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