feat(auditlog): NotifyDeliver rows carry the originating ParentExecutionId

tests/ScadaLink.Commons.Tests/Messages/NotificationMessagesTests.cs

@@ -81,6 +81,51 @@ public class NotificationMessagesTests
         Assert.Equal(executionId, roundTripped!.OriginExecutionId);
     }
 
+    [Fact]
+    public void NotificationSubmit_OriginParentExecutionId_DefaultsToNull()
+    {
+        // Audit Log ParentExecutionId: OriginParentExecutionId is an additive
+        // trailing member — a submit built without it (old call sites / old
+        // serialized payloads, or non-routed runs) leaves the id null.
+        var msg = new NotificationSubmit(
+            "notif-6", "Operators", "Subject", "Body",
+            "site-01", "inst-1", "OnAlarm", DateTimeOffset.UtcNow);
+
+        Assert.Null(msg.OriginParentExecutionId);
+    }
+
+    [Fact]
+    public void NotificationSubmit_OriginParentExecutionId_RoundTripsWhenSupplied()
+    {
+        var executionId = Guid.NewGuid();
+        var parentExecutionId = Guid.NewGuid();
+        var msg = new NotificationSubmit(
+            "notif-7", "Operators", "Subject", "Body",
+            "site-01", "inst-1", "OnAlarm", DateTimeOffset.UtcNow,
+            executionId, parentExecutionId);
+
+        Assert.Equal(parentExecutionId, msg.OriginParentExecutionId);
+    }
+
+    [Fact]
+    public void NotificationSubmit_OriginParentExecutionId_SurvivesJsonRoundTrip()
+    {
+        // The buffered S&F payload IS a serialized NotificationSubmit; the
+        // forwarder deserializes it, so OriginParentExecutionId must survive JSON.
+        var executionId = Guid.NewGuid();
+        var parentExecutionId = Guid.NewGuid();
+        var msg = new NotificationSubmit(
+            "notif-8", "Operators", "Subject", "Body",
+            "site-01", "inst-1", "OnAlarm", DateTimeOffset.UtcNow,
+            executionId, parentExecutionId);
+
+        var json = System.Text.Json.JsonSerializer.Serialize(msg);
+        var roundTripped = System.Text.Json.JsonSerializer.Deserialize<NotificationSubmit>(json);
+
+        Assert.NotNull(roundTripped);
+        Assert.Equal(parentExecutionId, roundTripped!.OriginParentExecutionId);
+    }
+
     [Fact]
     public void NotificationSubmit_ValueEquality_EqualWhenAllFieldsMatch()
     {