Added a way to read what the AI received from your sources (#1100)

Co-authored-by: Thorsten Sommer <SommerEngineering@users.noreply.github.com>

app/MindWork AI Studio/Settings/DataModel/DataChat.cs

@@ -104,4 +104,14 @@ public sealed class DataChat(Expression<Func<Data, DataChat>>? configSelection =
     /// Should we show the latest message after loading? When false, we show the first (aka oldest) message.
     /// </summary>
     public bool ShowLatestMessageAfterLoading { get; set; } = true;
+
+    /// <summary>
+    /// Whether a chat reads an attached file again when the file changed since it was sent.
+    /// </summary>
+    /// <remarks>
+    /// Off by default: every later message of a chat sends the text a file had when it was first
+    /// sent, so that what the AI received stays the same and can be shown as it was, see
+    /// FileAttachment.ProvenanceId. A file which is gone keeps its text either way.
+    /// </remarks>
+    public bool ReadChangedAttachmentsAgain { get; set; } = ManagedConfiguration.Register(configSelection, n => n.ReadChangedAttachmentsAgain, false);
 }