List a public/competitor creator's videos by platform + handle. Sort by 'recent' or 'top'
(best-performing); optionally with analysis inline. Only returns creators already in the
analysis library — for one you haven't ingested yet this returns
reason="creator_not_in_library" with a next_step of analyze_creator(platform, username),
not an error. When more videos exist beyond this page the response includes next_cursor —
pass it back as cursor (same sort/filters) to fetch the next page; when next_cursor is
absent you have everything.
ConnectorOAuth