M6-04: Maintainer final Go/No-Go and submission closure

[pillowtalk-Qy]

Type: Final Maintainer Gate
Priority: P0
Initial status: Blocked
Owner: Maintainer only
Depends on: M6-01 through M6-03
Writable: Tracker/submission confirmation metadata only

唯一目标

在 RC、现场备份、媒体和提交材料全部一致时给出最终 Go，并保存提交确认。

验收

[ ] RC tag 未被意外改变
[ ] public/local fallback healthy
[ ] Fixture fallback explicit
[ ] video playable
[ ] repo public and README accurate
[ ] submission text accurate
[ ] core insight understandable
[ ] speaking/order roles confirmed
[ ] backup device/network ready
[ ] submission acknowledged

Codex 指令

只读执行最终 consistency audit，输出 GO/NO-GO 建议和 blocker。
不要提交表单、关闭 Issue 或代表 Maintainer作最终决定。

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