~x-ai/grok-latest → A (3:1)

Commit A delivers lasting architectural value by introducing a full RocksDB-backed durable crate, offloading entity JSON payloads out of the in-memory GlobalTree into EntityStore, and replacing bulk event load with true line-at-a-time replay to cut startup RAM. Commit B is a worthwhile but narrower refactor that extracts canonical_path/identity modules and enforces naked stored-form identities on the wire; it improves modularity and API consistency without adding comparable runtime capability or resource wins.