openai/gpt-chat-latest → B (3:2)

Side B makes a durable architectural change by removing persistent storage of Reddit API payloads (`EntityStore` and `EntityImported` events), replacing it with ephemeral projection-only content, TTL-based eviction, and a simplified replay path that logs only `NodeEnsured` structure. Side A introduces a substantial URL canonicalization graph with parsing, generic fallbacks, builders, and extensive tests, but it is largely additive functionality, whereas Side B simplifies core persistence semantics and better aligns the storage model with long-term policy and replay behavior.