Bump vitest from 3.0.9 to 3.1.1 in /packages/worker

Bumps [vitest](https://github.com/vitest-dev/vitest/tree/HEAD/packages/vitest) from 3.0.9 to 3.1.1.
- [Release notes](https://github.com/vitest-dev/vitest/releases)
- [Commits](https://github.com/vitest-dev/vitest/commits/v3.1.1/packages/vitest)

---
updated-dependencies:
- dependency-name: vitest
  dependency-version: 3.1.1
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

packages/worker/package.json

@@ -29,6 +29,6 @@
 		"prettier": "^3.5.3",
 		"typescript": "^5.8.2",
 		"typescript-eslint": "^8.28.0",
-		"vitest": "3.0.9"
+		"vitest": "3.1.1"
 	}
 }