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": "a881c596-4992-4a7a-b1a7-f5ba6bb14364",
    "type": "retrospective_processes",
    "attributes": {
      "name": "Retrospective Process 1",
      "description": "Retrospective Process 1 Description",
      "is_default": false,
      "created_at": "2025-11-21T14:33:44.037-08:00",
      "updated_at": "2025-11-21T14:33:44.037-08:00",
      "retrospective_process_matching_criteria": {
        "severity_ids": [
          "62acea11-4481-4868-a3c6-20301d7bed78"
        ]
      }
    },
    "relationships": {
      "retrospective_steps": {
        "data": [
          {
            "id": "2ac38046-8436-43b1-bdfe-09694c5cf871",
            "type": "retrospective_steps"
          },
          {
            "id": "b5f30ae2-637f-44e4-9b2f-c179931ab646",
            "type": "retrospective_steps"
          }
        ]
      },
      "severities": {
        "data": [
          {
            "id": "62acea11-4481-4868-a3c6-20301d7bed78",
            "type": "severities"
          }
        ]
      }
    }
  }
}