Retrieve the aggregate performance totals for a campaign. This is the v3 equivalent of the v1 campaign_report_totals action.

Totals are lifetime by default. Supply startDate and endDate together to restrict them to a date window; supplying only one of the two, or an endDate earlier than the startDate, returns 422.

Every field of the response is always present, and is null when the underlying report does not provide it, so the shape does not change between the lifetime and the date-windowed variants.

Requires the Campaigns module and permission to access the campaign.