Codex Responses Proxy v4.0.4

What's Changed

• ci(release): verify published assets across platforms by @HengYangDS in #59
• ci(release): keep published lifecycle paths portable by @HengYangDS in #60
• docs(openspec): close published lifecycle acceptance by @HengYangDS in #61
• build(toolchain): advance uv to 0.12.16 by @HengYangDS in #62
• build(toolchain): refresh resolved Python graph by @HengYangDS in #63
• chore(release): prepare 4.0.4 by @HengYangDS in #64

Full Changelog: v4.0.3...v4.0.4