I am encountering an issue when attempting to share the same ModelContainer instance between two separate targets: App and WidgetBundle. To achieve this, I created a StorageController to manage the ModelContainer and injected it into both targets.

// StorageController.swift
@MainActor
public static var globalInstance: StorageController = StorageController()

let modelContainer: ModelContainer
let modelContext: ModelContext

@MainActor
init() {
  do {
    let schema = Schema([
      Item.self,
    ])
    let config = ModelConfiguration(schema: schema, isStoredInMemoryOnly: false)
    modelContainer = try ModelContainer(for: schema, configurations: config)
    modelContext = modelContainer.mainContext
    Logger().info("init modelContainer")

    guard let urlApp = FileManager.default.urls(for: .applicationSupportDirectory, in: .userDomainMask).last else { return }
    let url = urlApp.appendingPathComponent("default.store")
    if FileManager.default.fileExists(atPath: url.path) {
      Logger().info("swiftdata db at (url.absoluteString)")
    } else {
      Logger().warning("can't find swiftdata db")
    }
  } catch {
    fatalError("Could not initialize ModelContainer")
  }
}

// MyWidgetExtentionBundle.swift
@main
struct MyWidgetExtentionBundle: WidgetBundle {
  @MainActor
  init() {
    Logger().info("MyWidgetExtentionBundle init")
    let sc = StorageController.globalInstance

    AppDependencyManager.shared.add(dependency: sc)
  }

  var body: some Widget {
    MyWidgetExtention()
  }
}

// AppIntentsInWidgetExtentionApp.swift
@main
struct AppIntentsInWidgetExtentionApp: App {
  @State
  private var storageController: StorageController

  init() {
    let sc = StorageController.globalInstance
    storageController = sc
  }

  var body: some Scene {
    WindowGroup {
      VStack {
        Text("Total item cnt:(storageController.fetchItems().count)")
        Button("Add Item") {
          storageController.addItem(name: "Item-(UUID().uuidString)")
        }
      }
    }
  }
}

However, after adding logging to verify the location of the ModelContainer store file, I found that two different default.store files are being created.

# start with App
swiftdata db at file:///Users/username/Library/Developer/CoreSimulator/Devices/99106351-788D-4605-A5E6-475AD73ED05C/data/Library/Application%20Support/default.store
# start with WidgetBundle
swiftdata db at file:///Users/username/Library/Developer/CoreSimulator/Devices/99106351-788D-4605-A5E6-475AD73ED05C/data/Containers/Data/Application/7465C92B-AC5A-4AB0-BA68-2EEB78C16A38/Library/Application%20Support/default.store

What is the correct approach to ensure that the ModelContainer is shared between the App and WidgetBundle targets, so that data remains synchronized?