openai/gpt-chat-latest → A (3:2)

Side A adds an end-to-end `room create` CLI command that authenticates, invokes the `RoomCreate` RPC, prints the new room ID, updates documentation, and simplifies the underlying data model by removing the unused room visibility field and replacing the room registry with a `HashSet` of room IDs. Side B fixes Reddit child import behavior by attaching imported posts directly under the fetched parent and displaying imported titles in the unranked list, with improved integration tests, but its scope is a targeted correctness fix rather than a broader capability addition.