chore: stack upgrade

[hieu-w]

Motivation and Context

Jira Link:

Description

How has this been tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• My code follows the code style of this project. (run lint)
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.
• My code requires a db migration.

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Note

Low Risk
Primarily a CI/runtime version bump plus a small README formatting tweak; risk is limited to potential build/compat issues under Node 24.

Overview
Updates the project’s Node.js baseline by switching GitHub Actions CI from Node 22.x to 24.x and aligning .nvmrc to >=24.x.

Also removes the README mention of a UMD build format, keeping the documented distribution formats to esm and commonjs.

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