Added the guided chat to the BeyondFacts Lab (#1177)

app/MindWork AI Studio/Tools/Services/StoredChatLocation.cs

@@ -0,0 +1,27 @@
+using AIStudio.Assistants.BeyondFactsLab;
+
+namespace AIStudio.Tools.Services;
+
+/// <summary>
+/// Where the cleanup of the provenance store at the start finds a chat: in a workspace, among the temporary chats,
+/// or in a preparation of the BeyondFacts Lab.
+/// </summary>
+/// <remarks>
+/// Create it with InWorkspace or InLab.
+/// </remarks>
+/// <param name="WorkspaceId">The workspace of a chat outside the lab, Guid.Empty for a temporary chat.</param>
+/// <param name="LabThread">The step of the preparation a chat of the lab belongs to, or null for any other chat.</param>
+public readonly record struct StoredChatLocation(Guid WorkspaceId, BflThreadLocation? LabThread)
+{
+    /// <summary>
+    /// Gets the place of a chat in a workspace or among the temporary chats.
+    /// </summary>
+    /// <param name="workspaceId">The workspace, Guid.Empty for a temporary chat.</param>
+    public static StoredChatLocation InWorkspace(Guid workspaceId) => new(workspaceId, null);
+
+    /// <summary>
+    /// Gets the place of a chat of the BeyondFacts Lab.
+    /// </summary>
+    /// <param name="thread">The step of the preparation the chat belongs to.</param>
+    public static StoredChatLocation InLab(BflThreadLocation thread) => new(Guid.Empty, thread);
+}