Fixed classic RAG sending more passages than the model can take (#1168)

app/MindWork AI Studio/Tools/RAG/AugmentationResult.cs

@@ -7,9 +7,13 @@ namespace AIStudio.Tools.RAG;
 /// </summary>
 /// <remarks>
 /// The contexts the AI received can be fewer than the ones retrieved, e.g., when a check of which
-/// passages fit the question left some out. Whoever lists the sources and passages of the answer
-/// takes them from here, so the user sees what the AI read and nothing else.
+/// passages fit the question left some out, or when not all of them fit into what the model can
+/// read. Whoever lists the sources and passages of the answer takes them from here, so the user
+/// sees what the AI read and nothing else. Whoever restricts the chat for the data sources which
+/// brought passages into it counts them here as well, so that a data source none of whose passages
+/// reached the AI restricts nothing.
 /// </remarks>
 /// <param name="ChatThread">The augmented chat thread.</param>
 /// <param name="UsedContexts">The retrieval contexts handed to the AI, in the order it received them.</param>
-public sealed record AugmentationResult(ChatThread ChatThread, IReadOnlyList<PreparedRetrievalContext> UsedContexts);
+/// <param name="PassageCounts">How many retrieval contexts of each data source the AI received, in the order the data sources were handed in.</param>
+public sealed record AugmentationResult(ChatThread ChatThread, IReadOnlyList<PreparedRetrievalContext> UsedContexts, IReadOnlyList<int> PassageCounts);