openai/gpt-5.2-chat → B (9:1)

Commit B makes sweeping architectural changes: it removes the EntityStore and EntityImported event, rewires journal and projection layers, updates storage schema and DTOs, introduces ephemeral Reddit content with TTL eviction, modifies reducers, state initialization, background tasks, and adjusts Rust and Clojure tests accordingly. This significantly changes data durability semantics and system behavior. Commit A mainly adds a planning document and introduces a small RouteContext wrapper module with minimal integration impact. Therefore, B contributes far more substantial functionality and structural change.