List Activity

List activity events for the authenticated user within their bound team.

Scoped to the caller and their credential's team: a user can belong to several teams, so filtering on the user alone discloses the other teams' project and dataset names (ENG-7141). Paginated via limit/offset.

Args: limit: Maximum number of activity events to return per page. offset: Number of events to skip for pagination. auth: Authentication result containing user and team context.

Returns: ActivityLogResponse containing activity events in reverse-chronological order.

Raises: HTTPException: 403 when no team is resolved for the caller, or 500 if the activity log retrieval fails.