CI lint gate misses JS test files and Node build scripts #985

The JS lint gate in CI (npm run lint in format.yml) only covers src/**/*.{ts,tsx} because of the lint script's glob in crates/trusted-server-js/lib/package.json. ESLint errors in test/**, the Node build scripts (build-all.mjs, build-prebid-external.mjs), and config files are invisible to CI — npx eslint . on main reports 280 accumulated errors:

• 249 × @typescript-eslint/no-explicit-any in test files (the established (window as any) mock convention)
• 16 × no-undef in the .mjs Node scripts (process/console/Buffer — no Node globals declared for them)
• 10 × import/order, 4 × @typescript-eslint/no-unused-vars (intentionally unused _-prefixed params), 1 × prefer-const

New lint errors in these files land unnoticed.

Fix: widen the lint script to eslint . and make the widened surface clean — disable no-explicit-any for tests (matching the existing convention), declare Node globals for the .mjs scripts, honor the ^_ unused-arg convention, and fix the mechanical remainder. No workflow change needed since format.yml already runs npm run lint.