Retrieves a retrospective process

curl --request GET \
  --url https://api.rootly.com/v1/retrospective_processes/{id} \
  --header 'Authorization: Bearer <token>'

{
  "data": {
    "id": "7154bab5-3ae4-4b20-a4b9-3c9208b5647f",
    "type": "retrospective_processes",
    "attributes": {
      "name": "Ut veritatis odio corporis.",
      "description": "Voluptas omnis fugiat. Minima non id. Sit dolores quos.",
      "is_default": false,
      "created_at": "2025-09-16T04:49:29.762-07:00",
      "updated_at": "2025-09-16T04:49:29.762-07:00",
      "retrospective_process_matching_criteria": {
        "incident_type_ids": [
          "4d3aa5ff-b797-42ef-8f4d-79f61e57fb3f"
        ]
      }
    },
    "relationships": {
      "retrospective_steps": {
        "data": [
          {
            "id": "a55fafb1-3014-47fc-b172-cbb6e27aa2db",
            "type": "retrospective_steps"
          },
          {
            "id": "83a222e0-a970-4fbe-bcab-b6cdfc9bdcd6",
            "type": "retrospective_steps"
          }
        ]
      },
      "incident_types": {
        "data": [
          {
            "id": "4d3aa5ff-b797-42ef-8f4d-79f61e57fb3f",
            "type": "incident_types"
          }
        ]
      }
    }
  }
}