Start an outbound call

curl --request POST \
  --url https://atoms-api.smallest.ai/api/v1/conversation/outbound \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "agentId": "60d0fe4f5311236168a109ca",
  "phoneNumber": "+1234567890"
}'

{
  "status": true,
  "data": {
    "conversationId": "CALL-XXXXX1234"
  }
}