GET /shipments/{id}/eta

curl "https://api.lumivik.eu/v2/shipments/{id}/eta" \
  -H "Authorization: Bearer $TOKEN"

{
  "eta": "2026-09-30T03:40:00Z",
  "window": [
    "2026-09-30T03:10:00Z",
    "2026-09-30T04:25:00Z"
  ],
  "factors": [
    {
      "name": "border_queue",
      "delta_min": 42
    }
  ]
}