List campaign selections

List every campaign campaigns_summaries_list_v2 holds under the same product and lifecycle-status filters, narrowly, to select them all across its pages: each campaign's id, product, lifecycle status, schedule mode (with a one-time campaign's next run) and work state, the facts a lifecycle command's eligibility reads, by name, up to 1,000 a page. Returns totalCount; pass the returned nextCursor to continue. A cursor whose campaign has left the list is refused, and the caller starts again. Read a campaign's full row with campaigns_summaries_get_v2.