chore(deps-dev): bump @vitest/coverage-v8 from 4.1.5 to 4.1.9

Bumps [@vitest/coverage-v8](https://github.com/vitest-dev/vitest/tree/HEAD/packages/coverage-v8) from 4.1.5 to 4.1.9.
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Changelog](https://github.com/vitest-dev/vitest/blob/main/docs/releases.md)
- [Commits](https://github.com/vitest-dev/vitest/commits/v4.1.9/packages/coverage-v8)

---
updated-dependencies:
- dependency-name: "@vitest/coverage-v8"
  dependency-version: 4.1.8
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

package-lock.json

@@ -225,7 +225,7 @@
   "devDependencies": {
     "@opentelemetry/api": "1.9.1",
     "@types/node": "25.6.1",
-    "@vitest/coverage-v8": "4.1.5",
+    "@vitest/coverage-v8": "4.1.9",
     "esbuild": "0.28.0",
     "fast-check": "4.7.0",
     "typescript": "6.0.3",