~x-ai/grok-latest → B (2:5)

B adds durable EntityImported events, stores full API payloads for replay, switches Reddit loading to explicit user fetch with real integration coverage, and rewires the broker/UI around that model—lasting product and architecture value. A is a sound but narrower storage simplification (Deque→List/Vec, trim-on-write → cap-on-read) without comparable feature or durability impact.