curl --request GET \
  --url https://api.callab.ai/v1/contacts/{id} \
  --header 'Authorization: Bearer <token>'

{
  "status": "ok",
  "message": "<string>",
  "data": {
    "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "company_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "firstname": "<string>",
    "lastname": "<string>",
    "phone_number": "<string>",
    "metadata": {},
    "number_country_code": "<string>",
    "last_call_status": "<string>",
    "last_call_at": "2023-11-07T05:31:56Z",
    "last_call_duration": 123,
    "last_call_feedback": "<string>",
    "source_name": "<string>",
    "tag_name": "<string>",
    "category_name": "<string>",
    "notes": "<string>",
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z",
    "campaign_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
    "status": "<string>",
    "workspace_id": "<string>"
  }
}