feat(auditlog): NotifyDeliver rows carry the originating ParentExecutionId

src/ScadaLink.ConfigurationDatabase/Configurations/NotificationOutboxConfiguration.cs

@@ -51,6 +51,10 @@ public class NotificationOutboxConfiguration : IEntityTypeConfiguration<Notifica
         // 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.
 
+        // OriginParentExecutionId (Audit Log #23): nullable uniqueidentifier carried from
+        // the site — the routed run's parent ExecutionId — so the dispatcher can echo it
+        // onto NotifyDeliver audit rows. No index — same rationale as OriginExecutionId.
+
         builder.HasIndex(n => new { n.Status, n.NextAttemptAt });
 
         builder.HasIndex(n => new { n.SourceSiteId, n.CreatedAt });

src/ScadaLink.ConfigurationDatabase/Migrations/20260521220924_AddNotificationOriginParentExecutionId.cs

@@ -0,0 +1,42 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace ScadaLink.ConfigurationDatabase.Migrations
+{
+    /// <summary>
+    /// Adds the <c>OriginParentExecutionId</c> correlation column to the central
+    /// <c>Notifications</c> table (#21). It carries the originating routed script
+    /// execution's <c>ParentExecutionId</c> from the site so the dispatcher can echo it
+    /// onto the <c>NotifyDeliver</c> audit rows (#23), linking them to the routed run's
+    /// parent. Sibling of <c>OriginExecutionId</c>.
+    ///
+    /// The change is purely additive: <c>OriginParentExecutionId uniqueidentifier NULL</c>
+    /// is added with no default, so the operation is a metadata-only
+    /// <c>ALTER TABLE … ADD</c>. Unlike <c>AuditLog</c>, the <c>Notifications</c> table is
+    /// NOT partitioned, so a plain <c>ADD</c> is fine. No index is created — the column is
+    /// never a query predicate, only copied onto audit events. Historical rows stay
+    /// <c>NULL</c>.
+    /// </summary>
+    public partial class AddNotificationOriginParentExecutionId : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<Guid>(
+                name: "OriginParentExecutionId",
+                table: "Notifications",
+                type: "uniqueidentifier",
+                nullable: true);
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "OriginParentExecutionId",
+                table: "Notifications");
+        }
+    }
+}

src/ScadaLink.ConfigurationDatabase/Migrations/ScadaLinkDbContextModelSnapshot.cs

@@ -797,6 +797,9 @@ namespace ScadaLink.ConfigurationDatabase.Migrations
                     b.Property<Guid?>("OriginExecutionId")
                         .HasColumnType("uniqueidentifier");
 
+                    b.Property<Guid?>("OriginParentExecutionId")
+                        .HasColumnType("uniqueidentifier");
+
                     b.Property<string>("ResolvedTargets")
                         .HasColumnType("nvarchar(max)");