Fixed configuration-managed settings remaining active after their configuration plugin was removed (#892)

Co-authored-by: Thorsten Sommer <SommerEngineering@users.noreply.github.com>

app/MindWork AI Studio/Settings/DataModel/Data.cs

@@ -63,6 +63,11 @@ public sealed class Data
     /// </summary>
     public Dictionary<string, ManagedEditableDefaultState> ManagedEditableDefaults { get; set; } = [];
 
+    /// <summary>
+    /// The configuration plugin that owns each locked managed setting.
+    /// </summary>
+    public Dictionary<string, Guid> ManagedLockedConfigurations { get; set; } = [];
+
     /// <summary>
     /// Cached audit results for assistant plugins.
     /// </summary>