Fetches comments on a TikTok video by URL — useful for reading audience reactions, replies, and engagement. Returns comments, an array where each comment includes text, digg_count (likes), reply_comment_total, create_time, and a user object with the commenter's nickname and unique_id; also returns total comment count. Paginate with cursor from the previous response. Public photo/slideshow posts are supported as well as videos. Comments use a separate TikTok public web source, so successful single-post metadata retrieval does not guarantee readable comments. An empty terminal pa Uses the caller's OpenAny gateway credentials. Charges and authorization are determined by the gateway.