openai/gpt-chat-latest → A (9:4)

Side A introduces substantial new infrastructure: a new RocksDB-backed `durable` workspace crate, an `EntityStore` that moves raw Reddit JSON out of in-memory state, and streaming event-log replay via `EventLog::replay`, reducing startup memory while preserving functionality. Side B is a worthwhile architectural refactor that separates path normalization and identity parsing, enforces stored-form identities without `@`, and updates APIs accordingly, but it primarily reorganizes validation and representation rather than adding comparable runtime capabilities.