openai/gpt-chat-latest → B (9:1)

Side B introduces substantial new functionality: a RocksDB-backed durable storage crate, a new `EntityStore` that moves raw entity JSON out of in-memory state, and a streaming `EventLog::replay` API that replays events line-by-line instead of loading the entire log into memory, with corresponding integration changes across the server. Side A is a useful maintenance improvement that replaces hand-maintained Kaocha namespace lists with a single auto-discovered `^test\..+` suite, reducing future configuration work, but its impact is much narrower.