curl -X POST https://api.rapidcall.ai/api/agents/g4d3cXIpDr/workflow/validate \
  -H "Authorization: Bearer YOUR_TOKEN"

{
  "valid": true,
  "errors": []
}

{
  "valid": false,
  "errors": [
    { "nodeId": "node_5", "message": "Node is not connected to any edge." },
    { "nodeId": "node_3", "message": "Transfer node is missing a phone number." }
  ]
}