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": "9527bda0-c25e-4f8d-8c3e-95bdd60ef7e1",
    "type": "retrospective_processes",
    "attributes": {
      "name": "Retrospective Process 1",
      "description": "Retrospective Process 1 Description",
      "is_default": false,
      "created_at": "2025-10-08T04:38:58.786-07:00",
      "updated_at": "2025-10-08T04:38:58.786-07:00",
      "retrospective_process_matching_criteria": {
        "severity_ids": [
          "94aa6830-a8e5-4b43-a64a-c5aca4968336"
        ]
      }
    },
    "relationships": {
      "retrospective_steps": {
        "data": [
          {
            "id": "5168cbc5-09c7-4896-9fa6-a15d2ad435f4",
            "type": "retrospective_steps"
          },
          {
            "id": "08933056-1b11-44f2-a442-1c24da7678d6",
            "type": "retrospective_steps"
          }
        ]
      },
      "severities": {
        "data": [
          {
            "id": "94aa6830-a8e5-4b43-a64a-c5aca4968336",
            "type": "severities"
          }
        ]
      }
    }
  }
}