CommitScheduler uploads parquet batches in background (results never
lost on crash/timeout). --resume picks up from last completed batch.
CleanupScheduler deletes local shards after upload to prevent disk fill.
Validated on full 2724-page Encyclopaedia Britannica run (~$5, 0 errors).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>