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": "9b464822-4bc6-4722-8412-ff2873b49e52",
    "type": "retrospective_processes",
    "attributes": {
      "name": "Retrospective Process 1",
      "description": "Retrospective Process 1 Description",
      "is_default": false,
      "created_at": "2025-11-20T15:57:10.301-08:00",
      "updated_at": "2025-11-20T15:57:10.301-08:00",
      "retrospective_process_matching_criteria": {
        "severity_ids": [
          "499e9ba1-cdda-43b0-9a01-8eae13a5ed0e"
        ]
      }
    },
    "relationships": {
      "retrospective_steps": {
        "data": [
          {
            "id": "db768f71-f0ff-4a5a-a494-6160ee801e4d",
            "type": "retrospective_steps"
          },
          {
            "id": "fe42b689-6ef1-40a0-9606-caeb42b298b2",
            "type": "retrospective_steps"
          }
        ]
      },
      "severities": {
        "data": [
          {
            "id": "499e9ba1-cdda-43b0-9a01-8eae13a5ed0e",
            "type": "severities"
          }
        ]
      }
    }
  }
}