fix: arm automation on post-netload command

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

@@ -45,7 +45,13 @@ internal static class FirstLimitedApplyAutomationBootstrap
     // Public test command is intentionally side-effect free with respect to Plant APIs.
     internal static void Arm()
     {
-        if (state is BootstrapState.Prepared) state = BootstrapState.Armed;
+        if (state is BootstrapState.Prepared)
+        {
+            // The command itself is the post-NETLOAD barrier. The next Idle
+            // callback, not this command callback, is allowed to start work.
+            observedIdle = true;
+            state = BootstrapState.Armed;
+        }
     }
 
     private static void OnIdle(object? sender, EventArgs args)

Plant3D2026/P_Rec_Annot/tests/PRecAnnot.Core.Tests/FoundationTests.cs

@@ -70,6 +70,7 @@ public sealed class FoundationTests
         Assert.DoesNotContain("PlantProject.LoadProject", bootstrap);
         Assert.DoesNotContain("MdiActiveDocument", bootstrap);
         Assert.Contains("AcadApplication.Idle += OnIdle", bootstrap);
+        Assert.Contains("observedIdle = true", bootstrap);
         Assert.Contains("coordinatorStartCount++", bootstrap);
     }