0.27.0

Codex 0.27.0

• MCP stability: drop mutexes earlier and avoid lock ordering pitfalls.
• Channel reliability: switch to unbounded channel to prevent stalls.
• Performance/cleanup: remove unnecessary flush() calls.
• CI: fix release build; specify --profile for cargo clippy.
• Docs: safer Homebrew snippet; suggest just fix -p in AGENTS.md.

Merged PRs

• [#2881] Suggest just fix -p in agents.md
• [#2878] fix: drop Mutexes earlier in MCP server
• [#2876] fix: drop Mutex before calling tx_approve.send()
• [#2874] fix: switch to unbounded channel
• [#2873] fix: remove unnecessary flush() calls
• [#2871] fix: specify --profile to cargo clippy in CI
• [#2868] Bugfix: Prevents brew install codex in comment to be executed
• [#2864] Fix CI release build