curl "https://zeplo.ai/api/conversations/1/messages?page=1&limit=50" \
  -H "x-api-key: YOUR_API_KEY" \
  -H "x-api-secret: YOUR_API_SECRET" \
  -H "x-channel-id: YOUR_CHANNEL_ID"

{
  "success": true,
  "data": [
    {
      "id": 42,
      "conversationId": 1,
      "type": "text",
      "content": { "text": "Hello!" },
      "direction": "inbound",
      "status": "delivered",
      "senderName": "John Doe",
      "senderPhone": "919876543210",
      "createdAt": "2026-01-15T10:00:00Z"
    },
    {
      "id": 43,
      "conversationId": 1,
      "type": "text",
      "content": { "text": "Hi John! How can we help?" },
      "direction": "outbound",
      "status": "read",
      "senderName": "Agent Smith",
      "createdAt": "2026-01-15T10:01:00Z"
    }
  ],
  "pagination": {
    "page": 1,
    "limit": 50,
    "total": 120,
    "totalPages": 3
  }
}