getImprovement

Get full details for an improvement item including evidence, activity log, compliance context, and the checklist array (each item: id, text, due_date, completed_at, plus server-stamped attribution). Returns versionTimestamp: pass it to updateImprovement for optimistic locking. (For tasks specifically, use getTask + updateTask which are symmetric aliases.) Also returns the work hierarchy: parentItem (the item this one belongs to, such as its epic or story: { id, friendlyId, title, type, status, isTask }, or null), children (the items that belong to it, in status order then by id, at most 200: each with ownerId, ownerTeamId and percentComplete) and childProgress { total, done, closed } over every child (closed counts done, rejected and deferred). Set a parent with parentItemId on updateImprovement or updateTask.