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": "82e9b8fd-e141-4646-a9b8-01e7f3945585",
    "type": "retrospective_processes",
    "attributes": {
      "name": "Retrospective Process 1",
      "description": "Retrospective Process 1 Description",
      "is_default": false,
      "created_at": "2025-09-18T00:29:09.531-07:00",
      "updated_at": "2025-09-18T00:29:09.531-07:00",
      "retrospective_process_matching_criteria": {
        "severity_ids": [
          "3ea4df05-7558-4ee3-9f58-2726eeccdab4"
        ]
      }
    },
    "relationships": {
      "retrospective_steps": {
        "data": [
          {
            "id": "9a697cb1-de1a-4f57-811e-d47420dc3ce7",
            "type": "retrospective_steps"
          },
          {
            "id": "d5e3c912-90d1-481d-97af-72b7ee76270c",
            "type": "retrospective_steps"
          }
        ]
      },
      "severities": {
        "data": [
          {
            "id": "3ea4df05-7558-4ee3-9f58-2726eeccdab4",
            "type": "severities"
          }
        ]
      }
    }
  }
}