Added results and exports to the BeyondFacts Lab (#1184)

app/MindWork AI Studio/Assistants/BeyondFactsLab/BflResultVersion.cs

@@ -0,0 +1,26 @@
+namespace AIStudio.Assistants.BeyondFactsLab;
+
+/// <summary>
+/// One version of a result: a draft, or the version the person confirmed.
+/// </summary>
+public sealed class BflResultVersion
+{
+    /// <summary>
+    /// Gets or sets the text of the result, in Markdown.
+    /// </summary>
+    public string Text { get; set; } = string.Empty;
+
+    /// <summary>
+    /// Gets or sets the revisions of the confirmed work states the result was built from, see
+    /// BflStaleness.ConfirmedRevisionsOf. A step without a confirmed work state at that time is missing.
+    /// </summary>
+    /// <remarks>
+    /// Editing the text keeps them: the person changes the wording, not what the result builds on.
+    /// </remarks>
+    public Dictionary<BflStep, int> WorkStateRevisions { get; set; } = [];
+
+    /// <summary>
+    /// Gets or sets when the lab wrote the draft, or when the person confirmed the result.
+    /// </summary>
+    public DateTimeOffset ChangedAtUtc { get; set; }
+}