vanta-state — the redb-backed persistent state store.
Holds the index/history/cache tables described in
docs/23-data-and-state-model.md: the store index, generation history, GC
roots, the resolution cache, and a meta table (schema version + the current
generation pointer). Records are serialized to bytes with serde_json and
stored under typed redb tables; all writes are transactional.
The store/caches (raw content-addressed bytes) live on the filesystem, not here — this crate is metadata only.