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/Services/Indexing/IndexedDocument.cs

@@ -0,0 +1,14 @@
+namespace AIStudio.Tools.Services.Indexing;
+
+/// <summary>
+/// What indexing a document stored: a new generation of its chunks, next to whatever the document had before.
+/// </summary>
+/// <remarks>
+/// The new generation replaces the stored one only once the kind of data source records the
+/// document as indexed, cf. DocumentRunProgress.RecordDocumentIndexedAsync. Until then, and for
+/// good when it fails, the document keeps the version it had.
+/// </remarks>
+/// <param name="ChunkCount">How many chunks were stored.</param>
+/// <param name="Generation">The generation of the chunks, cf. IndexedDocumentIds.CreateChunkIdSource.</param>
+/// <param name="ChunkIds">The ids of the chunks, which are also the ids of their points.</param>
+internal sealed record IndexedDocument(int ChunkCount, int Generation, IReadOnlyList<string> ChunkIds);