v1.153.4
Updates the bundled Codex app-server to 0.153.4.
- Includes upstream fixes for Astra model-picker visibility, the bundled default model, and async-question guidance.
- Protocol schemas are identical to 0.153.3; no generated model changes were needed.
Validation: make lint, make build, 22 focused release/binary tests, and a live app-server initialize + config/read smoke check passed.
Upstream release: https://github.com/openai/codex/releases/tag/rust-v0.153.4