getContact loads a complete contact and can include campaign statistics for a
date interval.
Example
Inputs
identifier: string | number is required. identifierType can be email_id,
contact_id, ext_id, phone_id, whatsapp_id, or landline_number_id;
provide it when the value is ambiguous. Optional inclusive startDate and
endDate must be supplied together. account selects the Brevo binding.
Output
Returns a contact with positive numericid, optional email, attributes,
createdAt, modifiedAt, listIds, email/SMS/WhatsApp blacklist booleans, and
optional listUnsubscribed, consentGroups, and statistics. Statistics are
returned only when Brevo supplies them, normally for a requested date interval.