Get the stored deep analysis of a creator by creatorId, as an object: positioning, pillars (emoji, title, description), targetAudience, tone, formats (name, description), hooks, whatToAdapt, funnel (predominant tofu | mofu | bofu, text) and videoType (predominant spoken | text_on_screen | mix, text). Analyses belong to the user, not to one brand, the same as in the app. Also returns catalogSummary in the brand language independently of the saved deep analysis; a missing deep analysis does not mean the catalog summary is missing. Does not return videos, video analyses or transcripts, and does not generate anything. Returns analysis null when no saved deep analysis exists yet.