ArgumentOutOfRange exception when scrolling ItemRepeater with images too fast

### Describe the bug

I have an ItemsRepeater and attached to it is an AnnotatedScrollBar. When I scroll up and down pretty fast. The whole app crashes and throws the "System.ArgumentOutOfRangeException" in WinRT.Runtime.dll

I have only tested with images. Maybe it happens even with something else, but images are my main thing to show there so that's what I tested for.

As you can also see in the video, when I start scrolling everything works, it's not even a problem, that the images do not render directly. I guess it's normal due to the virtualization. The problem appears after some time, when the app starts with the loading cursor and becomes completely unresponsive.

### Steps to reproduce the bug

```xml

```

```cs
private void annotatedScrollBar_Loaded(object sender, Microsoft.UI.Xaml.RoutedEventArgs e)
{
imageItemRepeaterScroller.ScrollPresenter.VerticalScrollController = annotatedScrollBar.ScrollController;
}

//load some images:
var images = Directory.GetFiles("C:\\Users\\MYUSER\\Pictures\\Screenshots");
var items = new ObservableCollection(images);
imageRenderer.ItemsSource = items;

```

Now launch the app, you should see a list of 200 screenshots. Hope you have, otherwise maybe select a different folder. Now start scrolling really fast up and down using the annotatedScrollBar and at some point the app will crash with a "System.ArgumentOutOfRangeException" in WinRT.Runtime.dll exception.

### Expected behavior

I don't want it to crash. There is no problem if it loads or shows nothing for a short time, but a crash is
inappropriate.

### Screenshots

https://github.com/user-attachments/assets/f5ecc5a6-5ea0-48a4-ae57-741e5d8d217f

### NuGet package version

WinUI 3 - Windows App SDK 1.6.3: 1.6.241114003

### Windows version

Windows 11 (24H2): Build 26100

### Additional context

_No response_

Start by running the provided ItemsRepeater, LinedFlowLayout, ScrollView, and AnnotatedScrollBar reproduction with about 200 images, then capture the complete exception stack beyond WinRT.Runtime.dll. Investigate the rapid-scroll path and verify that repeated scrolling no longer crashes or leaves the app unresponsive.

Written by the indexing model from the issue text.