openai/gpt-chat-latest → A (3:2)

Side A adds a substantive new URL canonicalization subsystem with a graph-based traversal engine, parsing/normalization, generic fallback, builder validation, and extensive tests covering Reddit, YouTube, breadcrumbs, encoding, and regressions. Side B introduces a durable RocksDB crate and starts offloading entity payloads plus streaming event-log replay, but much of the patch is new library scaffolding, documentation, examples, and dependency/vendor churn relative to the smaller set of integrated behavioral changes.