openai/gpt-chat-latest → B (20:1)

Commit B makes a substantial architectural and behavioral change across the codebase. It removes persistent storage of Reddit payloads from the event log, deletes the EntityStore subsystem, changes the event model by eliminating EntityImported events, introduces ephemeral projection-cached content with TTL-based eviction, updates the journal, projection pipeline, Reddit importer, storage schema, application state, tests, and documentation/comments to match the new design. This changes persistence semantics, privacy/data-retention behavior, and replay logic while adding new functionality and migration of many call sites. Commit A primarily adds a detailed planning document plus a small RouteContext wrapper module and re-export. While the design document is valuable for future work, it has minimal runtime impact compared with the extensive implementation in commit B.