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": "71c5d059-f9b9-4bba-9a9b-1d23bd52d1ed",
    "type": "retrospective_processes",
    "attributes": {
      "name": "Retrospective Process 1",
      "description": "Retrospective Process 1 Description",
      "is_default": false,
      "created_at": "2025-11-28T18:12:50.086-08:00",
      "updated_at": "2025-11-28T18:12:50.086-08:00",
      "retrospective_process_matching_criteria": {
        "severity_ids": [
          "1d3f62d1-bff1-400b-8efa-03d3d77e39a4"
        ]
      }
    },
    "relationships": {
      "retrospective_steps": {
        "data": [
          {
            "id": "3ea2868f-b6ce-48bb-a1a9-b586f3fb21e3",
            "type": "retrospective_steps"
          },
          {
            "id": "dc8a678d-2655-4b8a-858d-760ffebaba0a",
            "type": "retrospective_steps"
          }
        ]
      },
      "severities": {
        "data": [
          {
            "id": "1d3f62d1-bff1-400b-8efa-03d3d77e39a4",
            "type": "severities"
          }
        ]
      }
    }
  }
}