Lists campaigns for an organization based on filters.

Supports two pagination methods. Cursor-based (cursor/limit) is stable and performant on large
datasets; it is triggered automatically when a cursor parameter is provided, and cursor and offset
cannot be combined. Offset-based (offset/limit) remains supported. Both methods return a
metadata object with a next_cursor field — pass it back as cursor to fetch the next page; when
next_cursor is null, there are no more results. Filters are not encoded in the cursor, so include them
on every request.