## What changed
- Replace direct `reqwest` error types in `codex-protocol` with
`codex_http_client::HttpError`.
- Build the response-stream error test through
`codex_http_client::HttpResponse`.
- Remove `codex-protocol` from the direct `reqwest` dependency allowlist.
## Testing
- Update the response-stream failure test to cover status and URL propagation
through the shared HTTP response wrapper.
GitOrigin-RevId: 7abcbbe55f994acb13cccefef806a53c7008acde