Get Campaign by ID

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

{
  "status": "<string>",
  "message": "<string>",
  "data": {
    "name": "<string>",
    "notes": "<string>",
    "status": "<string>",
    "campaign_type": "<string>",
    "contacts_list_source": [
      "<string>"
    ],
    "contacts_list_tags": [
      "<string>"
    ],
    "contacts_list_categories": [
      "<string>"
    ],
    "contacts_list_source_metadata": {},
    "agent_variables_contact_metadata_mapping": {},
    "call_progress": 123,
    "call_time_of_day_from": "<string>",
    "call_time_of_day_to": "<string>",
    "number_of_call_attempts": [
      123
    ],
    "retry_delay": [
      123
    ],
    "retry_delay_unit": [
      "<string>"
    ],
    "days_of_week": [
      4
    ],
    "time_zone": "<string>",
    "created_at": "2023-11-07T05:31:56Z",
    "updated_at": "2023-11-07T05:31:56Z",
    "deleted_at": "2023-11-07T05:31:56Z",
    "started_at": "2023-12-25",
    "ended_at": "2023-12-25",
    "webhook_mapping_variables": {},
    "webhook_mapping_variables_sources": {},
    "workspace": "<string>"
  }
}