~anthropic/claude-sonnet-latest → B (85:15)

Side B is a substantive, tested architectural change: it removes the EntityStore/EntityImported design, replaces it with ephemeral projection-only Reddit content plus a TTL eviction task, updates the event log schema, storage schema, journal wiring, and adjusts/fixes both Rust and Clojure tests to match the new behavior. Side A is purely a planning document (plan.md) plus a thin, mostly unused RouteContext wrapper that just delegates to existing ThreadNav methods—useful as a roadmap but no functional or tested change to the running system.