Set up code coverage tracking

[0xgetz]

Integrate code coverage tracking with Coveralls or Codecov to monitor test coverage.

Objectives

• Choose coverage tracking service (Coveralls or Codecov)
• Configure coverage reporting in CI/CD
• Set up coverage badges in README
• Establish coverage thresholds

Integration Steps

1. Select coverage service
2. Add coverage reporter to test configuration
3. Configure CI to upload coverage reports
4. Add badges to repository README
5. Set up coverage threshold enforcement

Acceptance Criteria

• Coverage reports are generated for all packages
• Coverage data is visible on GitHub
• Coverage thresholds are enforced in CI
• Coverage trends are tracked over time