Returns one customer's activity events, most recent first, page-paginated.

• user_id is required and the customer must belong to the site; a customer from another site returns 404.
• Paginate with page and limit (events per page); pagination details are in the response meta (current_page, per_page, total, last_page).
• Each event includes its time, name, code, page path, referrer domain, country, platform, and UTM source/campaign.

Unlike the other endpoints, this is a per-event list rather than an aggregation.