Fetch plan version by external ID

curl --request GET \
  --url https://api.withorb.com/v1/plans/external_plan_id/{external_plan_id}/versions/{version} \
  --header 'Authorization: Bearer <token>'

{
  "created_at": "2023-11-07T05:31:56Z",
  "version": 123,
  "plan_phases": [
    {
      "id": "<string>",
      "description": "<string>",
      "duration": 123,
      "duration_unit": "daily",
      "name": "<string>",
      "order": 123
    }
  ],
  "prices": [
    {
      "metadata": {},
      "id": "<string>",
      "name": "<string>",
      "external_price_id": "<string>",
      "price_type": "usage_price",
      "model_type": "unit",
      "created_at": "2023-11-07T05:31:56Z",
      "cadence": "one_time",
      "billing_cycle_configuration": {
        "duration": 123,
        "duration_unit": "day"
      },
      "invoicing_cycle_configuration": {
        "duration": 123,
        "duration_unit": "day"
      },
      "billable_metric": {
        "id": "<string>"
      },
      "dimensional_price_configuration": {
        "dimensional_price_group_id": "<string>",
        "dimension_values": [
          "<string>"
        ]
      },
      "fixed_price_quantity": 123,
      "plan_phase_order": 123,
      "currency": "<string>",
      "conversion_rate": 123,
      "item": {
        "id": "<string>",
        "name": "<string>"
      },
      "credit_allocation": {
        "currency": "<string>",
        "allows_rollover": true,
        "custom_expiration": {
          "duration": 123,
          "duration_unit": "day"
        }
      },
      "discount": {
        "discount_type": "percentage",
        "applies_to_price_ids": [
          "h74gfhdjvn7ujokd",
          "7hfgtgjnbvc3ujkl"
        ],
        "reason": "<string>",
        "percentage_discount": 0.15
      },
      "minimum": {
        "minimum_amount": "<string>",
        "filters": [
          {
            "field": "price_id",
            "operator": "includes",
            "values": [
              "<string>"
            ]
          }
        ],
        "applies_to_price_ids": [
          "<string>"
        ]
      },
      "minimum_amount": "<string>",
      "maximum": {
        "maximum_amount": "<string>",
        "filters": [
          {
            "field": "price_id",
            "operator": "includes",
            "values": [
              "<string>"
            ]
          }
        ],
        "applies_to_price_ids": [
          "<string>"
        ]
      },
      "maximum_amount": "<string>",
      "unit_config": {
        "unit_amount": "<string>"
      }
    }
  ],
  "adjustments": [
    {
      "id": "<string>",
      "is_invoice_level": true,
      "filters": [
        {
          "field": "price_id",
          "operator": "includes",
          "values": [
            "<string>"
          ]
        }
      ],
      "applies_to_price_ids": [
        "<string>"
      ],
      "reason": "<string>",
      "adjustment_type": "usage_discount",
      "usage_discount": 123,
      "plan_phase_order": 123
    }
  ]
}