[dependabot:release-train-updater] Review-mode dependency bundle ready: js-yaml 5.3.0 → 5.4.1 (target: github/gh-aw-firewall)

## Summary

A safe, low-risk dependency update was prepared for target repository `github/gh-aw-firewall` but this run is operating in **review mode**, so no pull request was opened directly against the target. Instead, an artifact-backed review bundle was published for human follow-up.

- **Target repository:** `github/gh-aw-firewall` (rendered as plain text intentionally, not linked)
- **Package/ecosystem:** `js-yaml` (npm), direct runtime dependency
- **Manifests:** `package.json`, `package-lock.json` (repo root)
- **Old version → New version:** `5.3.0` → `5.4.1` (patch)
- **Intended safe-output primitive:** `create-pull-request`
- **Review bundle:** published as workflow artifact `js-yaml-5.4.1` (bundle `dependabot-release-train-updater/js-yaml-5.4.1`)

### Why this update
`js-yaml` is exactly pinned and one patch release behind. It is a direct dependency used across core config/rule parsing (`src/config-file.ts`, `src/rules.ts`, `src/topology.ts`, `src/compose-sanitizer.ts`, `src/compose-network-conflicts.ts`, `src/config-writer.ts`). The 5.4.1 release is same-major, single unchanged transitive dependency (`argparse ^2.0.1`), no breaking changes identified.

### Validation performed
- Verified `js-yaml@5.4.1` package metadata via the public npm registry (target repo's configured private feed, `ms-feed-25.pkgs.visualstudio.com`, returned 403 in this sandbox).
- Installed `js-yaml@5.4.1` in isolation and smoke-tested `load()`/`dump()` round-trip, matching the API surface used by the target repo's source files.

### Known limitation
Could not run the target repository's own `npm ci` + Jest test suite in this sandbox (private registry inaccessible, and a full public-registry `npm ci` did not complete within the time budget for this run). Recommend running the target repo's standard CI on the resulting PR branch before merge.

### Recommended next step
A maintainer with target-repo write access (or a future `live`-mode run with proper authority) should open a PR in `github/gh-aw-firewall` applying the diff in the published review bundle artifact, then let CI validate before merge. Do not auto-merge.

### Control Plane
- Correlation ID: 33825841516-28
- Central repo: githubnext/gh-aw-cao
- Run URL: https://github.com/githubnext/gh-aw-cao/actions/runs/33825841516

Smart-Dependabot-Merge-Candidate: no (target CI not run in this sandbox)

> [!WARNING]
>
> Firewall blocked 1 domain
>
> The following domain was blocked by the firewall during workflow execution:
>
> - `msfeed25.pkgs.visualstudio.com`
>
> To allow these domains, add them to the `network.allowed` list in your workflow frontmatter:
>
> ```yaml
> network:
> allowed:
> - defaults
> - "msfeed25.pkgs.visualstudio.com"
> ```
>
> See [Network Configuration](https://github.github.com/gh-aw/reference/network/) for more information.
>
>

> Generated by [:dependabot: Dependabot / Release Trains](https://github.com/githubnext/gh-aw-cao/actions/runs/33826168519) · copilot · auto · 88 AIC · ⌖ 11.8 AIC · ⊞ 20.3K · [◷](https://github.com/search?q=repo%3Agithubnext%2Fgh-aw-cao+is%3Aissue+%22gh-aw-workflow-call-id%3A+githubnext%2Fgh-aw-cao%2Fdependabot-release-train-updater%22&type=issues)
>

_{Add this agentic workflow to your repo}

To install this agentic workflow, run

```
gh aw add githubnext/gh-aw-cao/.github/workflows/dependabot-release-train-updater.md@main
```

> - [x] expires on Sep 18, 2026, 2:01 AM UTC

Start with the published js-yaml-5.4.1 review bundle and the target repository's root package.json and package-lock.json. Check the listed js-yaml usages in src/config-file.ts, src/rules.ts, src/topology.ts, src/compose-sanitizer.ts, src/compose-network-conflicts.ts, and src/config-writer.ts. Done means applying the bundle in a PR for github/gh-aw-firewall and passing its npm ci and Jest CI checks.

Written by the indexing model from the issue text.