Update article automation settings

Update the team's article automation settings. All fields optional; only provided fields change. Toggle automation on/off, set postingFrequency (e.g. daily/weekly), preferredPostingTime (a named window - past-midnight/morning/afternoon/evening/night - or an exact 24h "HH:MM"), timeZone (IANA zone, e.g. "Asia/Kolkata", that posting times resolve against), preferredTopicIds, preferredArticleTypes, content length (short/medium/long), CMS target, image styles, and auto-update rules.