curl -X POST "https://app.talkover.ai/api/v1/callback-agents/agent-uuid-1/check-constraints" \
  -H "Authorization: Bearer talq_your_environment_token_here" \
  -H "Content-Type: application/json" \
  -d '{
    "is_callback_agent": true,
    "callback_source_agents": ["agent-uuid-2", "agent-uuid-3"],
    "callback_trigger_statuses": ["no_answer", "voicemail", "busy"]
  }'

{
  "success": true,
  "message": "Configuration is valid"
}

{
  "success": false,
  "message": "Configuration has errors",
  "errors": [
    "Agent must be inbound to serve as a callback agent",
    "Source agent agent-uuid-3 is not published"
  ]
}