build(deps): add @vitest/coverage-v8 for test coverage reporting

Author: MichaelKreil

package-lock.json

@@ -37,6 +37,7 @@
     "@types/node": "^24.10.1",
     "@typescript-eslint/eslint-plugin": "^8.47.0",
     "@typescript-eslint/parser": "^8.47.0",
+    "@vitest/coverage-v8": "^4.0.10",
     "eslint": "^9.39.1",
     "tsx": "^4.20.6",
     "typescript": "^5.9.3",