Reproducible state reconstruction

Reproducible state reconstruction means rebuilding complete state from raw observations alone. If the database is lost, replay reconstructs the same state deterministically.

Before vs after

Before: restoring requires uncertain backups and manual reconciliation. After: replay up to timestamp T recreates state at T exactly, then replay to present restores current state.

# Verify timeline events are available
neotoma timeline list

# Recompute and verify snapshots
neotoma entities list --type task --limit 20

This depends on replayable timeline, deterministic state evolution, and auditable change log.