tip leaf: keep one row when message re-sent same id (#51033) #162

Goal

Fork-only tip leaf for origin anomalyco#51033 — keep one row when a message is re-sent with the same id.

Context

Origin tip SHA 29b50abfd5e97693851ecddfdad5d225a5436c30. Base: fork dev. github_writes_origin=0. Codex promote parked.

Acceptance

• CLEAN fail→pass on tip test a message re-sent with the same id keeps one row at the new creation time
• GREEN 1 / NEG 1 fail / RESTORE 1

Return

Ship fork PR with grok bot + envelope; no origin writes.