feat: add controlled p-rec-annot line-number apply

Plant3D2026/P_Rec_Annot/src/PRecAnnot.Plant3D2026/EntryPoint.cs

@@ -98,6 +98,19 @@ public sealed class EntryPoint : IExtensionApplication
             var operations = string.Join(", ", preview.Plan!.Operations.Select(value => $"{value.Kind}:{value.Text}"));
             editor.WriteMessage($"\nPXP-LN preview: {operations}. DWG не изменён.");
             RuntimeDiagnostics.Write("LineNumberPreviewCompleted", commandName: "PXP-LN", resultStatus: "PreviewCompleted", document: document, details: new Dictionary<string, object?> { ["OperationCount"] = preview.Apply.Count });
+            if (ParseMode(RuntimeDiagnostics.RuntimeMode) != PRecAnnotExecutionMode.Apply) return;
+
+            var operation = preview.Apply.SingleOrDefault() ?? throw new InvalidOperationException("LINE_NUMBER_APPLY_REQUIRES_EXACTLY_ONE_OPERATION");
+            var placement = editor.GetPoint("\nУкажите положение маркера номера линии: ");
+            if (placement.Status != PromptStatus.OK) return;
+            operation = operation with { Position = new AnnotationPoint(placement.Value.X, placement.Value.Y, placement.Value.Z) };
+            var permit = LineNumberApplyPermitReader.Read();
+            LineNumberApplyPermitReader.Validate(document, permit, operation);
+            // AutoCAD wraps a command's committed transaction in its native
+            // UNDO record.  No compensating-delete path is used here.
+            var result = new LineNumberAnnotationWriter().Apply(document, [operation], configuration.Assets);
+            RuntimeDiagnostics.Write("LineNumberApplyCompleted", commandName: "PXP-LN", resultStatus: result.Created > 0 ? "Created" : result.Updated > 0 ? "Updated" : "AlreadyCurrent", document: document, details: new Dictionary<string, object?> { ["Created"] = result.Created, ["Updated"] = result.Updated, ["AlreadyCurrent"] = result.Unchanged });
+            editor.WriteMessage($"\nPXP-LN Apply: created={result.Created}; updated={result.Updated}; already-current={result.Unchanged}.");
         }
         catch (System.Exception exception)
         {

Plant3D2026/P_Rec_Annot/src/PRecAnnot.Plant3D2026/LineNumberApplyPermit.cs

@@ -0,0 +1,37 @@
+using System.Text.Json;
+using Autodesk.AutoCAD.ApplicationServices;
+using PRecAnnot.Abstractions;
+
+namespace PRecAnnot.Plant3D2026;
+
+internal sealed record LineNumberApplyPermit
+{
+    public required bool AllowApply { get; init; }
+    public required string FixtureMarkerPath { get; init; }
+    public required string ExpectedStableId { get; init; }
+    public required string ExpectedText { get; init; }
+}
+
+internal static class LineNumberApplyPermitReader
+{
+    private const string MarkerContent = "P_REC_ANNOT_TEST_FIXTURE=LINE_NUMBER_APPLY";
+
+    public static void Validate(Document document, LineNumberApplyPermit permit, LineNumberApplyPreflight operation)
+    {
+        if (!permit.AllowApply || !string.Equals(permit.ExpectedStableId, operation.StableId, StringComparison.Ordinal) || !string.Equals(permit.ExpectedText, operation.Text, StringComparison.Ordinal))
+            throw new InvalidOperationException("LINE_NUMBER_APPLY_PERMIT_PLAN_MISMATCH");
+        if (!Path.IsPathFullyQualified(permit.FixtureMarkerPath) || permit.FixtureMarkerPath.StartsWith("\\\\", StringComparison.Ordinal) || !File.Exists(permit.FixtureMarkerPath) || !string.Equals(File.ReadAllText(permit.FixtureMarkerPath).Trim(), MarkerContent, StringComparison.Ordinal))
+            throw new InvalidOperationException("LINE_NUMBER_APPLY_TEST_FIXTURE_REQUIRED");
+        var fixtureRoot = Path.GetDirectoryName(Path.GetFullPath(permit.FixtureMarkerPath))! + Path.DirectorySeparatorChar;
+        if (!Path.GetFullPath(document.Name).StartsWith(fixtureRoot, StringComparison.OrdinalIgnoreCase)) throw new InvalidOperationException("LINE_NUMBER_APPLY_TEST_FIXTURE_REQUIRED");
+    }
+
+    public static LineNumberApplyPermit Read()
+    {
+        var path = Environment.GetEnvironmentVariable("P_REC_ANNOT_LINE_NUMBER_APPLY_PERMIT_PATH");
+        if (string.IsNullOrWhiteSpace(path) || !Path.IsPathFullyQualified(path) || path.StartsWith("\\\\", StringComparison.Ordinal) || !File.Exists(path))
+            throw new InvalidOperationException("LINE_NUMBER_APPLY_PERMIT_REQUIRED");
+        return JsonSerializer.Deserialize<LineNumberApplyPermit>(File.ReadAllText(path), new JsonSerializerOptions { PropertyNameCaseInsensitive = true })
+            ?? throw new InvalidOperationException("LINE_NUMBER_APPLY_PERMIT_INVALID");
+    }
+}