Update to Node.js 22 LTS

[kraftbj]

Summary

• Update from Node.js 20 to Node.js 22 LTS across .nvmrc, CI workflows, and package.json engines
• Drop the npm engine constraint — Node 22 ships with a compatible version
• Regenerate package-lock.json with Node 22

Node 20 reaches EOL on 2026-04-30. Node 22 LTS is supported until 2027-04-30.

Test plan

• npm ci installs cleanly on Node 22
• Unit tests pass (npm test)
• E2E tests pass (npm run test:e2e)
• CI workflows pass on this PR

[Copilot]

Pull request overview

Updates the repo’s Node.js baseline to Node 22 LTS to keep local development and CI aligned with the supported runtime as Node 20 approaches EOL.

Changes:

• Bump the required Node version in package.json engines to >=22 and drop the explicit npm engine constraint.
• Update .nvmrc to Node 22.
• Update GitHub Actions workflows to run tests and release builds on Node 22.

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 3 comments.

File	Description
package.json	Updates Node engine requirement to Node 22 and removes npm engine constraint.
.nvmrc	Updates local Node version target to 22.
.github/workflows/test.yml	Runs JS, lint, and E2E workflows using Node 22.
.github/workflows/release.yml	Builds release artifacts using Node 22.

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[Copilot]

Pull request overview

Updates the repository’s JavaScript toolchain baseline to Node.js 22 LTS and aligns local development and GitHub Actions CI to use a single Node version source of truth.

Changes:

• Bump Node engine requirement to >=22 and remove the explicit npm engine constraint.
• Update .nvmrc to Node 22.
• Switch CI workflows to read the Node version from .nvmrc via actions/setup-node’s node-version-file.

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated no comments.

File	Description
package.json	Updates engines to require Node 22+ and drops the npm engine constraint.
.nvmrc	Sets local Node version to 22.
.github/workflows/test.yml	Uses .nvmrc for Node setup across test/lint/e2e jobs to prevent version drift.
.github/workflows/release.yml	Uses .nvmrc for Node setup in the release build workflow.

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