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": "dc087c42-c0c0-4882-9c17-8a07583fa424",
    "type": "retrospective_processes",
    "attributes": {
      "name": "Retrospective Process 1",
      "description": "Retrospective Process 1 Description",
      "is_default": false,
      "created_at": "2025-10-30T18:06:02.343-07:00",
      "updated_at": "2025-10-30T18:06:02.343-07:00",
      "retrospective_process_matching_criteria": {
        "severity_ids": [
          "9f541ab5-bdd6-447b-8f31-a22f931e4d38"
        ]
      }
    },
    "relationships": {
      "retrospective_steps": {
        "data": [
          {
            "id": "9cca400e-4b33-48a8-aab7-e58fcf0abe2b",
            "type": "retrospective_steps"
          },
          {
            "id": "d8a349e5-b743-470e-924d-e127723041c4",
            "type": "retrospective_steps"
          }
        ]
      },
      "severities": {
        "data": [
          {
            "id": "9f541ab5-bdd6-447b-8f31-a22f931e4d38",
            "type": "severities"
          }
        ]
      }
    }
  }
}