fix: close all automation-opened documents

Plant3D2026/P_Rec_Annot/src/PRecAnnot.Plant3D2026/FirstLimitedApplyAutomation.cs

@@ -129,6 +129,7 @@ internal sealed class FirstLimitedApplyAutomationCoordinator
     }
     private FirstApplyAutomationConfiguration? config;
     private Document? document;
+    private readonly List<Document> automationOpenedDocuments = [];
     private readonly List<string> completed = [];
     private int step;
     private int? before, after1, after2, afterUndo;
@@ -159,9 +160,10 @@ internal sealed class FirstLimitedApplyAutomationCoordinator
             var project = PlantProject.LoadProject(projectXml, false, string.Empty, string.Empty);
             PlantApplication.SetCurrentProject(project, true);
             transitions.Add("ProjectActivated");
-            if (!string.IsNullOrWhiteSpace(config.ModelDrawingPath)) AcadApplication.DocumentManager.Open(config.ModelDrawingPath, false);
+            if (!string.IsNullOrWhiteSpace(config.ModelDrawingPath)) automationOpenedDocuments.Add(AcadApplication.DocumentManager.Open(config.ModelDrawingPath, false));
             transitions.Add("DocumentOpenStarted");
             document = AcadApplication.DocumentManager.Open(config.OrthoDrawingPath, false);
+            automationOpenedDocuments.Add(document);
             AcadApplication.DocumentManager.MdiActiveDocument = document;
             transitions.Add("DocumentOpened");
             document.CommandEnded += OnCommandEnded;
@@ -315,12 +317,15 @@ internal sealed class FirstLimitedApplyAutomationCoordinator
             exitHandlerSubscribed = false;
             // Do not close a cached automation document and then reuse it. Resolve
             // the currently-live document only at the final quiescent callback.
-            var active = AcadApplication.DocumentManager.MdiActiveDocument;
-            if (active is not null)
+            // Only documents opened by this coordinator may be closed. Keep no
+            // document reference after closing it; DocumentDestroyed can run
+            // immediately as part of CloseAndDiscard.
+            foreach (var opened in automationOpenedDocuments.ToArray().Reverse())
             {
-                transitions.Add("ActiveDocumentCloseRequested");
-                active.CloseAndDiscard();
+                transitions.Add("AutomationDocumentCloseRequested");
+                opened.CloseAndDiscard();
             }
+            automationOpenedDocuments.Clear();
             // Application.Quit alone leaves the script host alive. Close the
             // live document first, then request normal application shutdown.
             transitions.Add("ApplicationQuitRequested");