feat(auditlog): ExecutionId column on AuditEvent + central AuditLog

src/ScadaLink.Commons/Entities/Audit/AuditEvent.cs

@@ -26,6 +26,13 @@ public sealed record AuditEvent
     /// <summary>Correlation id linking related audit rows (e.g. the cached-op lifecycle).</summary>
     public Guid? CorrelationId { get; init; }
 
+    /// <summary>
+    /// Id of the originating script execution / inbound request — the universal
+    /// per-run correlation value, distinct from <see cref="CorrelationId"/> (which
+    /// is the per-operation lifecycle id).
+    /// </summary>
+    public Guid? ExecutionId { get; init; }
+
     /// <summary>Site id where the action originated; null for central-direct events.</summary>
     public string? SourceSiteId { get; init; }