Upstream wire-contract drift detected (openai/codex)

[github-actions]

The weekly upstream-drift check found wire-contract changes in openai/codex.

Next steps:

1. Pull the upstream-manifest-drift artifact (regenerated manifest + diff).
2. Review the diff against src/ behavior; the contract tests in
   test/upstream-contract.test.ts describe each manifest section.
3. Regenerate locally: git clone --filter=blob:none --depth 1 https://github.com/openai/codex.git /tmp/codex-upstream && npm run manifest
4. Update the tool or the manifest, then land both together.