chore: update node, and pin version to make heroku happy

[seriouslysean]

⚠️ need to pin the version to make Heroku happy ⚠️

see https://devcenter.heroku.com/articles/nodejs-support

Issue number

Relevant issue number

• Resolves #

Please check the following

• Do the tests still pass? (see Run the Tests)
• Is the code formatted properly? (see Linting (Formatting))
• For New Features:
  • Have tests been added to cover any new features or fixes?
  • Has the documentation been updated accordingly?

Please describe additional details for testing this change

[Copilot]

Pull Request Overview

This PR updates the Node.js engine requirement in both package.json and package-lock.json files from >=22.11.0/22.11 to a pinned version 22.21.1. This change removes the flexible version range (>=) in favor of an exact version specification.

• Changes Node.js engine specification from a minimum version constraint to a pinned version
• Updates both package.json and package-lock.json to maintain consistency

Reviewed Changes

Copilot reviewed 1 out of 2 changed files in this pull request and generated no comments.

File	Description
package.json	Updates Node.js engine from >=22.11.0 to 22.21.1
package-lock.json	Updates Node.js engine from 22.11 to 22.21.1 for consistency

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[Copilot]

Pull Request Overview

Copilot reviewed 3 out of 4 changed files in this pull request and generated no new comments.

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