How relationships work?

[pnewell]

How are relationships supposed to work? I have setup a simple example and it doesn't appear that they are actually linked. If I updated a subdocument (linked via HasOne), should any document that has that document id as a child also reference this updated version?

struct Item: Papyrus {
  let id: String
  @HasOne
  var subitem: SubItem
  
  init(id: String = UUID().uuidString, subitem: SubItem) {
    self.id = id
    self.subitem = subitem
  }
}

struct SubItem: Papyrus {
  let id: String
  var name: String
  
  init(id: String = UUID().uuidString, name: String) {
    self.id = id
    self.name = name
  }
}

@main
struct PapyrusExampleApp: App {
  @State var store: PapyrusStore = PapyrusStore()
  
    var body: some Scene {
        WindowGroup {
            ContentView()
            .task {
              var subitem = SubItem(name: "Tom")
              let item = Item(subitem: subitem)
              await store.save(item)
              subitem.name = "Sam"
              await store.save(subitem)
              let updatedItem: Item = try! await store.object(id: item.id).execute()
              let allitems = try! await store.objects(type: SubItem.self).execute()
              let allsubitems = try! await store.objects(type: SubItem.self).execute()
            }
        }
    }
}

With this example, all the SubItems are correctly renamed Sam as expected, but the fresh pull of the Items still show the original value of Tom.