openai/gpt-chat-latest → A (9:1)

Side A introduces substantial infrastructure: a new RocksDB-backed `durable` workspace crate, an `EntityStore` that moves raw Reddit JSON off-heap, updates the reducer to keep only derived entity data, and replaces startup `load_all` with streaming event-log replay to reduce memory usage. Side B mainly refactors the vote UI by adding compare-page morphing, pair-selection helpers, and ID normalization improvements, which are useful but much narrower in long-term architectural impact.