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/ProvenanceStore/ProvenanceKind.cs

@@ -0,0 +1,32 @@
+namespace AIStudio.Tools.Databases.ProvenanceStore;
+
+/// <summary>
+/// What sort of content a chat received, apart from its messages.
+/// </summary>
+/// <remarks>
+/// Stored by name, like the kinds of mail parts in the index: a new member may then go anywhere
+/// in this list, and the database reads on its own.
+/// </remarks>
+public enum ProvenanceKind
+{
+    /// <summary>
+    /// The content of a file the user attached to a message.
+    /// </summary>
+    ATTACHMENT,
+
+    /// <summary>
+    /// A passage a data source handed to the AI: a local one or an ERI server, through the classic
+    /// process or the semantic search.
+    /// </summary>
+    DATA_SOURCE_PASSAGE,
+
+    /// <summary>
+    /// A mail, or a part of one, which the AI received from a mailbox.
+    /// </summary>
+    MAIL,
+
+    /// <summary>
+    /// A web page the AI received, e.g., which a tool read for it.
+    /// </summary>
+    WEB_PAGE,
+}