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": "2841c2a9-02e0-4a8a-bede-bb83da9d5369",
    "type": "retrospective_processes",
    "attributes": {
      "name": "Retrospective Process 1",
      "description": "Retrospective Process 1 Description",
      "is_default": false,
      "created_at": "2026-02-05T23:16:05.136-08:00",
      "updated_at": "2026-02-05T23:16:05.136-08:00",
      "retrospective_process_matching_criteria": {
        "severity_ids": [
          "f6978241-1de2-4429-8eb6-10608711988c"
        ]
      }
    },
    "relationships": {
      "retrospective_steps": {
        "data": [
          {
            "id": "7e5d0791-a104-4c73-b2f8-1f1089f62bf3",
            "type": "retrospective_steps"
          },
          {
            "id": "30e6cbf9-40e5-451e-9e3c-f597deeabc9b",
            "type": "retrospective_steps"
          }
        ]
      },
      "severities": {
        "data": [
          {
            "id": "f6978241-1de2-4429-8eb6-10608711988c",
            "type": "severities"
          }
        ]
      }
    }
  }
}