Retrieves a paginated list of all audiences, with optional filtering and sorting. Use this endpoint to browse audiences or to find an audienceId before operating on rows, columns, or enrichment. Filter by type (CONTACT or COMPANY) and searchText (case-insensitive contains match on audience name). Use sort to order results by name, createdAt, updatedAt, or recordCount; prefix with - for descending order (default: -updatedAt). Use page[number] and page[size] (default 25, max 100) to paginate. Returns 200 with a paginated array of audience resources and navigation links. Returns 400 if filter or sort parameters are invalid.