List conversations (v2)

List Research interviews (one respondent's conversation each), newest first, each with its accepted answers coded (tone, tags, chosen options, a ranking's order, a scale's rating, a task's success), optionally narrowed to one campaign, a segment scope, and respondents who gave given answers (a chosen option or a coded tone). With campaignId it also names the campaign's study questions and counts the interviews before the answer filters. Pass the returned nextCursor with the same campaignId, segments and answer filters to continue after the last interview listed, at any page size; interviews that arrive mid-walk never shift a page, and nextCursor is null on the last page.