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": "5cba9638-cf9a-4c7d-9e9c-a5f14a08ed33",
    "type": "retrospective_processes",
    "attributes": {
      "name": "Retrospective Process 1",
      "description": "Retrospective Process 1 Description",
      "is_default": false,
      "created_at": "2025-10-28T10:26:54.042-07:00",
      "updated_at": "2025-10-28T10:26:54.042-07:00",
      "retrospective_process_matching_criteria": {
        "severity_ids": [
          "4c12a341-acfc-4ceb-8661-dd776a44aa4e"
        ]
      }
    },
    "relationships": {
      "retrospective_steps": {
        "data": [
          {
            "id": "8f0955a3-334c-4fac-b05c-b05478ebe94b",
            "type": "retrospective_steps"
          },
          {
            "id": "3c521d2b-72d6-4c82-817d-5fd237e1b7a7",
            "type": "retrospective_steps"
          }
        ]
      },
      "severities": {
        "data": [
          {
            "id": "4c12a341-acfc-4ceb-8661-dd776a44aa4e",
            "type": "severities"
          }
        ]
      }
    }
  }
}