For cloud applications we need to convert a Bitmap to byte[] to save into blob storage.

This requires interacting with System.Drawing.Common, which means taking that dependency on in the cloud app.

The Plot module should have a GetBitmapBytes() that lets you specify file format type, preventing the need to pass Bitmap objects around in the cloud

public static byte[] GetBytesPng(System.Drawing.Bitmap bmp)
{
    using MemoryStream stream = new();
    bmp.Save(stream, System.Drawing.Imaging.ImageFormat.Png);
    return stream.ToArray();
}