gaia-trace-timeline

Audit and repair Gaia user-tree timelines so every skill's current rank is explained by a chain of Hero's Journey events. Trigger this skill when: a contributor's profile chart shows a stale rank (e.g. still shows 3★ after a demotion to 1★); someone asks to "trace what happened" to a skill's rank; validate_timelines.py is failing in CI; you need to backfill missing demote or rank_up events before cutting a release;…