List procurements

Example response

{
  "object": "list",
  "data": [
    {
      "object": "procurement",
      "id": "proc_W9TRG",
      "instance_type": "h100i",
      "desired_quantity": 1,
      "buy_limit_price_per_gpu_hour": 250,
      "sell_limit_price_per_gpu_hour": 25,
      "horizon": 60,
      "colocation_strategy": {
        "cluster_name": "richmond"
      }
    }
  ]
}