openai/gpt-chat-latest → A (9:1)

Side A fixes a real functional bug where the external garden index incorrectly queried a bogus `https://.` parent by introducing `external_root_host_items`, ensuring host roots are discovered even from implicit child edges, and it adds a lasting resolver architecture (`server/src/resolvers/`) with rich GitHub import-card rendering integrated into item pages and vote comparison, backed by unit and integration tests. Side B is a useful but narrow correctness improvement that skips stickied/pinned Reddit posts during subreddit import by filtering `stickied`/`pinned` entries, with a corresponding test.