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/Tools/Databases/HiddenChunks.cs

@@ -0,0 +1,15 @@
+namespace AIStudio.Tools.Databases;
+
+/// <summary>
+/// The chunks of one document which no search may find.
+/// </summary>
+/// <remarks>
+/// A document is searched by the generation its index row names, and only once that generation is
+/// complete. Indexing it again writes the next generation next to it, and an attempt which failed
+/// may stay there afterward, so the next one can reuse its vectors, cf. IndexedRunContext. A
+/// document indexed for the first time has no searchable generation until its first one is
+/// complete. The index store knows all of this, and the vector store leaves out what it names.
+/// </remarks>
+/// <param name="ParentFileId">The parent id of the document.</param>
+/// <param name="SearchableGeneration">The generation which can be searched, so every other one is hidden. Null while the document has none, so all of its chunks are hidden.</param>
+public sealed record HiddenChunks(string ParentFileId, int? SearchableGeneration);