Release v4.9.1-beta.11

What's Changed

• fix(codex): preserve Responses prompt cache prefix (25942a1b)
• perf(codex): strip Responses status in linear time (c28f3289)
• test(cursorauth): tolerate deadline classification race (e82b11f0)

Full Changelog: v4.9.1-beta.10...v4.9.1-beta.11