Iterate on Codex label action

[rolandwalker]

Description

With the correct operators, limiting to

github.event.action == 'labeled'

Checklist

• I added this contribution to the changelog.md file.
• I added my name to the AUTHORS file (or it's already there).
• To lint and format the code, I ran

  uv run ruff check && uv run ruff format && uv run mypy --install-types .

[github-actions]

Findings

1. Behavioral regression for draft PRs
   For draft PRs, the job now only runs on the labeled action, even if the codex label is already present. This means subsequent events like synchronize or ready_for_review won’t trigger the job anymore, which is a regression compared to prior behavior. If the intent was to allow label-gated runs on any action (while draft), the new condition is too narrow.
   File: .github/workflows/codex-review.yml

Suggestions

1. If you meant “only when labeled” for drafts, consider explicitly scoping the workflow on: to pull_request with types: [labeled] for clarity and avoid missing other events inadvertently. Otherwise, restore the previous label check without the action == 'labeled' gating.