openai/gpt-5.2-chat → A (9:1)

Side A makes a deep architectural change: it removes the persisted EntityImported event and EntityStore, introduces ephemeral Reddit content caching in ProjectionStore with TTL eviction (e.g., put_ephemeral_content, evict_content_older_than, REDDIT_CONTENT_TTL), and rewires journal/projection/state logic and tests accordingly. Side B mainly adds initial scaffolding files and scripts (TEST.sh, bundle.js, parser.rs, etc.) without integrating them into the existing server architecture, providing comparatively less lasting structural impact.