Close ENNEAGRAM-LLMS-FULL-RELEASE-READINESS-02 ledger

[fermatmind]

What changed

• Closed the PR-train state for ENNEAGRAM-LLMS-FULL-RELEASE-READINESS-02 after PR ENNEAGRAM-LLMS-FULL-RELEASE-READINESS-02: re-evaluate Enneagram llms-full evidence gate #3023 merged.
• Recorded merge SHA 996a049, merged_at, branch cleanup, and post-merge revalidation facts.

Why

• fap-api PR-train rules require merged state closeout after branch-protected merge.

Validation

• python3 -m json.tool docs/codex/pr-train-state.json >/dev/null
• git diff --check

Deferred items

• No llms-full release was executed.
• No CMS/DB write, eligibility change, cache warm, Search Queue, IndexNow, deployment, secrets, or permissions change was performed.