Creates a retrospective process

curl --request POST \
  --url https://api.rootly.com/v1/retrospective_processes \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/vnd.api+json' \
  --data '{
  "data": {
    "type": "retrospective_processes",
    "attributes": {
      "name": "<string>",
      "copy_from": "<string>",
      "description": "<string>",
      "retrospective_process_matching_criteria": {
        "severity_ids": [
          "<string>"
        ]
      }
    }
  }
}'

{
  "data": {
    "id": "931d4e44-9785-4efe-bf7b-2bf29719214b",
    "type": "retrospective_processes",
    "attributes": {
      "name": "Retrospective Process 1",
      "description": "Retrospective Process 1 Description",
      "is_default": false,
      "created_at": "2025-06-20T12:03:07.444-07:00",
      "updated_at": "2025-06-20T12:03:07.444-07:00",
      "retrospective_process_matching_criteria": {
        "severity_ids": [
          "8d5d82b8-df2d-4991-bff3-b65774b11e5e"
        ]
      }
    },
    "relationships": {
      "retrospective_steps": {
        "data": [
          {
            "id": "ab4f9ae9-e8a7-4653-a6ef-2c5754747f20",
            "type": "retrospective_steps"
          },
          {
            "id": "54368191-53ff-45c7-aed8-d3d2c871ae40",
            "type": "retrospective_steps"
          }
        ]
      },
      "severities": {
        "data": [
          {
            "id": "8d5d82b8-df2d-4991-bff3-b65774b11e5e",
            "type": "severities"
          }
        ]
      }
    }
  }
}