@type t() :: %ArchAstro.Types.SolutionInstance{
  agent: String.t() | ArchAstro.Unset.t(),
  agent_name: String.t() | ArchAstro.Unset.t(),
  attachment_ref:
    %{optional(String.t()) => ArchAstro.JSON.t()} | ArchAstro.Unset.t(),
  created_at: DateTime.t(),
  customer_key: String.t(),
  customer_label: String.t() | ArchAstro.Unset.t(),
  id: String.t(),
  local_edit_count: integer() | ArchAstro.Unset.t(),
  pinned_template_version: String.t() | ArchAstro.Unset.t(),
  pinned_version_number: integer() | ArchAstro.Unset.t(),
  solution_template_config: String.t(),
  status: String.t(),
  updated_at: DateTime.t()
}