POST /api/v1/access/verify-gate
Content-Type: application/json
Authorization: Bearer <JWT_TOKEN>

{
  "gate_id": "GATE_NORTH_MOUNTAIN",
  "auth_type": "FACIAL_VECTOR",
  "vector_payload": [-0.124, 0.089, 0.342, ..., 0.012],
  "timestamp": 1786550400
}