CI: test suite does not run on PRs or pushes to main

[Anuj7411]

npm test and npm run test:e2e only appear in .github/workflows/release.yml, which triggers on tag push.

score.yml is the only workflow on pull_request and push: main, and it runs sipcode score only.

Result: a regression across 162 test files can land on main and stay green until release time.

Fix: add a test.yml running npm ci && npm run lint && npm test on pull_request and push to main.