Generated the JSON contracts of the stored data at compile time (#1148)

app/MindWork AI Studio/Tools/JsonSerializerOptionsExtensions.cs

@@ -0,0 +1,21 @@
+using System.Text.Json;
+
+namespace AIStudio.Tools;
+
+public static class JsonSerializerOptionsExtensions
+{
+    /// <summary>
+    /// Makes the options read-only and returns them, so that a static field gets its options in one expression.
+    /// </summary>
+    /// <remarks>
+    /// Options with contracts of their own, i.e., with a TypeInfoResolver, should never change after they were
+    /// declared: whoever used them before such a change would have read or written with other contracts.
+    /// </remarks>
+    /// <param name="options">The options, with their TypeInfoResolver set.</param>
+    /// <returns>The same options, now read-only.</returns>
+    public static JsonSerializerOptions AsReadOnly(this JsonSerializerOptions options)
+    {
+        options.MakeReadOnly();
+        return options;
+    }
+}