Alternative to the batcher approach (#848): parent fetches all room
meeting statuses in a single bulk POST and passes data down as props.
No extra dependency (@yornaath/batshit), no implicit batching magic.
Backend: POST /v1/rooms/meetings/bulk-status + bulk DB methods.
Frontend: useRoomsBulkMeetingStatus hook in RoomList, MeetingStatus
receives data as props instead of calling per-room hooks.
CI: fix pnpm 8→10 auto-detect, add concurrency group.
Tests: Jest+jsdom+testing-library for bulk hook.
083a50cbcd