curl --request POST \
  --url http://localhost:8080/api/calls/create-phone-call \
  --header 'Content-Type: application/json' \
  --header 'X-API-KEY: <api-key>' \
  --header 'X-API-SECRET: <api-key>' \
  --data '
{
  "from_number": "+14157774444",
  "to_number": "+12137774445",
  "override_agent_id": "agent-123",
  "metadata": {
    "customer_id": "cust-001",
    "campaign": "summer-2024",
    "priority": "high"
  }
}
'

{
  "message": "<string>",
  "status": "<string>",
  "error": "<string>",
  "data": {}
}