fix: resolve vitest peer dependency conflict (#224)

* fix: Resolve vitest peer dependency conflict

Fixed ERESOLVE error in CI caused by version mismatch between
vitest and @vitest/coverage-v8.

Changed:
- @vitest/coverage-v8: ^4.0.10 → ^3.2.4

The @vitest/coverage-v8@4.x package requires vitest@4.x as a peer
dependency, but we're using vitest@3.2.4. Downgrading the coverage
package to v3.2.4 resolves the peer dependency conflict.

Tests: ✅ 51/51 passing
Vulnerabilities: 0

Fixes CI build failures in GitHub Actions.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

* style: Fix Prettier formatting

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Co-authored-by: Claude <noreply@anthropic.com>

Author: ibrahimcesar