Added confirmed work states to the BeyondFacts Lab (#1182)

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

@@ -0,0 +1,33 @@
+namespace AIStudio.Assistants.BeyondFactsLab;
+
+/// <summary>
+/// A work state the person confirmed, which the later steps build on.
+/// </summary>
+public sealed class BflConfirmedWorkState
+{
+    /// <summary>
+    /// Gets or sets the revision of the work state, which grows with every confirmation of the step.
+    /// </summary>
+    public int Revision { get; set; }
+
+    /// <summary>
+    /// Gets or sets when the person confirmed the work state.
+    /// </summary>
+    public DateTimeOffset ConfirmedAtUtc { get; set; }
+
+    /// <summary>
+    /// Gets or sets the texts of the work state, by the keys of their sections. An empty section is left out.
+    /// </summary>
+    public Dictionary<string, string> Sections { get; set; } = new(StringComparer.Ordinal);
+
+    /// <summary>
+    /// Gets or sets the revisions of the confirmed work states of the earlier steps at the time of the confirmation.
+    /// An earlier step without a confirmed work state is missing.
+    /// </summary>
+    public Dictionary<BflStep, int> UpstreamRevisions { get; set; } = [];
+
+    /// <summary>
+    /// Gets or sets the fingerprint of the form of the step at the time of the confirmation.
+    /// </summary>
+    public string DetailsFingerprint { get; set; } = string.Empty;
+}