feat(auditlog): NotifyDeliver rows carry the originating ExecutionId

src/ScadaLink.ConfigurationDatabase/Configurations/NotificationOutboxConfiguration.cs

@@ -47,6 +47,10 @@ public class NotificationOutboxConfiguration : IEntityTypeConfiguration<Notifica
 
         builder.Property(n => n.SourceScript).HasMaxLength(200);
 
+        // OriginExecutionId (Audit Log #23): nullable uniqueidentifier carried from the
+        // site so the dispatcher can echo it onto NotifyDeliver audit rows. No index —
+        // it is never a query predicate on this table, only copied onto audit events.
+
         builder.HasIndex(n => new { n.Status, n.NextAttemptAt });
 
         builder.HasIndex(n => new { n.SourceSiteId, n.CreatedAt });