bootstrap/ sat as a sibling of ingest/ when it is ingest. Upstream nests backfill, live, orchestrator and syncstate under internal/ingest/; this matches the first of those. Renamed to backfill/ for the same reason -- it is upstream's word for this phase, and ours was a synonym nobody chose. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>