test: verify Safe Settings webhook delivery

[zeyu2001]

Purpose

Verify the production Safe Settings GitHub App receives a real pull_request.opened webhook through the configured Smee channel.

This branch contains one empty commit and no file changes. The expected App behavior is to create and complete a Safe-setting validator check with no configuration synchronization.

The PR and temporary branch will be removed after verification.

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Note

Low Risk
No application or infrastructure code is modified; risk is limited to transient test PR noise in the repo.

Overview
No code or configuration changes — this PR is an empty commit intended only to open a pull request and trigger GitHub’s pull_request.opened webhook.

The goal is to confirm the production Safe Settings GitHub App receives events via the configured Smee channel and runs the expected Safe-setting validator check (create/complete with no config sync). The branch and PR are temporary and planned for removal after verification.

^{Reviewed by Cursor Bugbot for commit 11579e2. Bugbot is set up for automated code reviews on this repo. Configure here.}

[zeyu2001]

Webhook smoke test found that the production image omits smee-client. Closing this no-diff PR while the runtime dependency is fixed; a fresh smoke PR will verify the deployed fix.