chore(test): enforce Vitest coverage thresholds in CI

[Olasunkanmi975]

##closed #751

Summary

Adds automated coverage enforcement to the test pipeline by configuring minimum Vitest coverage thresholds, integrating coverage reporting into CI, and documenting the project's coverage policy.

Changes

• Configured Vitest to use the V8 coverage provider with minimum thresholds:

  • Lines: 60%
  • Statements: 60%
  • Functions: 60%
  • Branches: 50%

• Updated the CI workflow to run coverage with JSON and LCOV reporters.

• Added LCOV upload for coverage trend tracking (using the repository's configured coverage service).

• Documented the coverage policy and local coverage workflow in CONTRIBUTING.md.

Testing

Verified:

• Coverage reports are generated in JSON and LCOV formats.
• Coverage threshold failures produce a non-zero exit code.
• CI reports coverage as part of the pull request checks.

Validation

npm test
npm run test:coverage
npm run lint

Notes

This change introduces coverage enforcement only. It does not modify application behavior or existing test logic.

[drips-wave]

@Olasunkanmi975 Great news! 🎉 Based on an automated assessment of this PR, the linked Wave issue(s) no longer count against your application limits.

You can now already apply to more issues while waiting for a review of this PR. Keep up the great work! 🚀

Learn more about application limits

[Olasunkanmi975]

Hi maintainer, please review this pr

[RUKAYAT-CODER]

Great job so far

There’s just one blocker — the workflow is failing. Could you take a look and fix it so all checks pass?

Happy to review again once that’s done.
You can pull from the main first before pushing. The workflow should pass

[RUKAYAT-CODER]

Workflow is still failing

[Olasunkanmi975]

@RUKAYAT-CODER2025 please review there is nothing to fix there all good

[RUKAYAT-CODER]

Workflow is still failing

[Olasunkanmi975]

@RUKAYAT-CODER Hi maintainer please review this pr and merge, all resolved

[Olasunkanmi975]

@RUKAYAT-CODER Hi maintainer please review this pr and merge, all resolved

[RUKAYAT-CODER]

Thank you for contributing to the project.