Get a contact with all the information Allo has about them.
Scope needed: CONTACTS_READ
The unique identifier of the contact (e.g., "cnt_abc123")
"cnt_abc123"
Comma-separated list of additional data to include. Available options: engagement (includes engagement level), activity (includes recent communication activities).
"engagement,activity"
Contact context retrieved successfully
Standard response wrapper for contact context
Comprehensive contact context including integration data and activity