tip leaf: retain numeric MCP timeout entries (#50911)

[kvnloo]

Goal

Fork-only tip leaf for origin anomalyco#50911 — retain numeric MCP timeout entries through V2→V1 config compat.

Context

Origin tip SHA c85065fb35a0ff4d6e77356a60c17989c4f89739. Base: fork dev. github_writes_origin=0. Codex promote parked.

Acceptance

• CLEAN fail→pass on tip MCP timeout tests (GREEN 4 / NEG 4 fail / RESTORE 4)

Return

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

[kvnloo]

Exact head is unchanged and the V2→V1 timeout mappings already have an upstream source-level review from us. No additional comment would add decision value. WAIT_EXTERNAL unless the head changes or a behavioral regression appears.