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": "f0dfd9d6-81a7-40e0-8df6-749a921dc5d5",
    "type": "retrospective_processes",
    "attributes": {
      "name": "Retrospective Process 1",
      "description": "Retrospective Process 1 Description",
      "is_default": false,
      "created_at": "2026-01-07T06:40:44.708-08:00",
      "updated_at": "2026-01-07T06:40:44.708-08:00",
      "retrospective_process_matching_criteria": {
        "severity_ids": [
          "def61d07-aa98-4ba9-b407-60aabee91a16"
        ]
      }
    },
    "relationships": {
      "retrospective_steps": {
        "data": [
          {
            "id": "60eb4438-5c25-451c-a1d9-db642412cc0e",
            "type": "retrospective_steps"
          },
          {
            "id": "9fdae611-fc3a-46ae-a14f-8ab799f6f5bf",
            "type": "retrospective_steps"
          }
        ]
      },
      "severities": {
        "data": [
          {
            "id": "def61d07-aa98-4ba9-b407-60aabee91a16",
            "type": "severities"
          }
        ]
      }
    }
  }
}