[Bug]: Localhost DNS `/etc/resolvers` directory watcher has racy startup, results in test flakes.

[jglogan]

I have done the following

• I have searched the existing issues
• If possible, I've reproduced the issue using the 'main' branch of this project

Steps to reproduce

This problem surfaces unpredictably in our CI tests and local builds. Locally, run:

make all test

Problem description

make all test occasionally fails with the error output:

✘ Test testWatchingNonExistingParent() recorded an issue at DirectoryWatcherTest.swift:131:13: Expectation failed: !((createdPaths.paths → []).isEmpty → true → true)

Environment

- OS: 26
- Xcode: 26
- Container: 1.2.0

Code of Conduct

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