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": "42576bf9-ec5b-41fa-9f12-1a9d655d908d",
    "type": "retrospective_processes",
    "attributes": {
      "name": "Retrospective Process 1",
      "description": "Retrospective Process 1 Description",
      "is_default": false,
      "created_at": "2026-01-31T09:19:07.429-08:00",
      "updated_at": "2026-01-31T09:19:07.429-08:00",
      "retrospective_process_matching_criteria": {
        "severity_ids": [
          "4b0b501c-b3fe-4c75-b8db-5c0e8ea5c109"
        ]
      }
    },
    "relationships": {
      "retrospective_steps": {
        "data": [
          {
            "id": "e2b6e2a0-e109-4a81-bd32-da89f4e28cd2",
            "type": "retrospective_steps"
          },
          {
            "id": "c20f9f86-65bb-48f9-bc3e-363b476421fe",
            "type": "retrospective_steps"
          }
        ]
      },
      "severities": {
        "data": [
          {
            "id": "4b0b501c-b3fe-4c75-b8db-5c0e8ea5c109",
            "type": "severities"
          }
        ]
      }
    }
  }
}