feat(transport): restore composition + alarm-script edges on bundle import

tests/ScadaLink.Transport.IntegrationTests/RoundTripTests.cs

@@ -221,10 +221,14 @@ public sealed class RoundTripTests : IDisposable
                 .Include(t => t.Compositions)
                 .SingleAsync(t => t.Name == "Pump");
             Assert.Equal("composes BaseDevice", pump.Description);
-            // Composition edges intentionally NOT restored by the v1 import
-            // (see BundleImporter.BuildTemplate XML comment). Round-trip's
-            // field-level identity holds; rebuilding the composition graph
-            // belongs to a follow-up task.
+            // FU-B / #39 — composition graph IS restored on import. The bundle
+            // carried Pump composing BaseDevice via InstanceName="base"; the
+            // importer's second pass (ResolveCompositionEdgesAsync) re-resolved
+            // ComposedTemplateName to BaseDevice's new id after the template
+            // flush and re-added the row.
+            var pumpComp = Assert.Single(pump.Compositions);
+            Assert.Equal("base", pumpComp.InstanceName);
+            Assert.Equal(baseDevice.Id, pumpComp.ComposedTemplateId);
 
             var standalone = await ctx.Templates.SingleAsync(t => t.Name == "Standalone");
             Assert.Equal("no deps", standalone.Description);