How can I identify changes made to a specific flow and who made those changes?

To find that out, you can use the following GraphQL query. It will output all changes including flow versions, who made those changes and when.

{
  flow(where: {name: {_eq: "loguru_flow"}}) {
    id
    name
    version
    created_by_user_id
    flow_group_id
    version_group_id
    updated
    created_by {
      id
      first_name
      last_name
      email
    }
  }
}