Ensure Formating on Lint

[bh2smith]

CI was not previously catching format errors.
This resulted in a lengthy back and forth on an external PR: #90

[cursor]

PR Summary

Ensures CI enforces code format and tidies ESLint config/comments. No runtime logic changes.

• Update package.json lint script to also run prettier --check across **/*.ts
• Tweak eslint.config.mjs by removing the no-unused-vars override and keeping TypeScript-specific rules
• Remove unnecessary eslint-disable comments in src/types/requestArgs.ts and src/utils.ts

^{Written by Cursor Bugbot for commit aaf6ec7. Configure here.}