List Voice AI calls

curl -s -H "Authorization: Bearer YOUR_TOKEN" \
  "https://benefitpath.com/api/v2/voice-ai/calls?page=1&limit=25"

{
  "success": true,
  "calls": [{
    "call_uuid": "c0a80101-0000-4000-8000-000000000007",
    "contact_uuid": "c0a80101-0000-4000-8000-000000000001",
    "contact_name": "Jane Doe",
    "phone": "+15551234567",
    "direction": "outbound",
    "status": "completed",
    "ended_reason": "customer-ended-call",
    "duration_seconds": 142,
    "voice_agent_uuid": "c0a80101-0000-4000-8000-000000000008",
    "scheduled_at": null,
    "started_at": "2026-07-21T18:02:00.000Z",
    "ended_at": "2026-07-21T18:04:22.000Z",
    "summary": "Contact confirmed interest and booked a follow-up.",
    "created_at": "2026-07-21T18:00:00.000Z"
  }],
  "pagination": { "page": 1, "limit": 25, "total": 1 }
}