GET List group members

GET /api/v1/contacts/groups/{groupId}/members

{
  "data": {
    "contacts": [
      {
        "id": "cnt_uuid",
        "name": "Awa Doe",
        "phone": "+33612345000",
        "tags": ["vip"],
        "addedAt": "2026-04-01T10:00:00.000Z"
      }
    ],
    "limit": 50,
    "total": 42,
    "nextCursor": "MjAyNi0wNC0wMVQxMDowMDowMC4wMDBafGNudF91dWlk",
    "hasMore": true
  }
}