curl --request GET \
  --url http://localhost:8080/api/calls/agent-performance \
  --header 'X-API-KEY: <api-key>' \
  --header 'X-API-SECRET: <api-key>'

{
  "message": "Agent performance retrieved successfully",
  "status": "success",
  "error": null,
  "data": {
    "agent_id": "agent-123",
    "total_calls": 50,
    "completed_calls": 45,
    "active_calls": 2,
    "status_distribution": {
      "REGISTERED": 3,
      "ONGOING": 2,
      "ENDED": 45
    },
    "direction_distribution": {
      "INBOUND": 25,
      "OUTBOUND": 20,
      "NOT_SET": 5
    },
    "disconnection_reasons": {
      "USER_HANGUP": 25,
      "AGENT_HANGUP": 15,
      "DIAL_NO_ANSWER": 3,
      "SYSTEM_ERROR": 2
    }
  }
}