feat(audit): ScriptTrace channel + RouteCall/ScriptRun/AttributeWrite/AttributeWait kinds

Flow Debugger (design 2026-09-05 §5.1): trace steps are audit rows. New
AuditChannel.ScriptTrace appended after Cluster and four kinds appended after
ManualFailover so stored ordinals never move; lock-in tests + alog.md §4 updated.

Claude-Session: https://claude.ai/code/session_01GSLkkHKz9JrAtmJjmQK3cP

src/ZB.MOM.WW.ScadaBridge.Commons/Types/Enums/AuditChannel.cs

@@ -21,5 +21,13 @@ public enum AuditChannel
     /// restarted the active node, which is exactly the kind of act an audit log exists to
     /// attribute. (decision 2026-07-22)
     /// </summary>
-    Cluster
+    Cluster,
+
+    /// <summary>
+    /// Flow Debugger trace rows (design 2026-09-05): a script run, an attribute write, an
+    /// attribute wait or a central route call, emitted only for traced executions
+    /// (plus the always-on <see cref="AuditKind.RouteCall"/>). Appended last so stored
+    /// ordinals of existing channels never move.
+    /// </summary>
+    ScriptTrace
 }

src/ZB.MOM.WW.ScadaBridge.Commons/Types/Enums/AuditKind.cs

@@ -49,5 +49,17 @@ public enum AuditKind
     /// is issued (the acting node is usually not the one that goes away, but the audit must
     /// survive either outcome). (decision 2026-07-22)
     /// </summary>
-    ManualFailover
+    ManualFailover,
+
+    /// <summary>Central <c>Route.To().Call</c> round-trip (always-on; <see cref="AuditChannel.ScriptTrace"/> channel).</summary>
+    RouteCall,
+
+    /// <summary>One site script run completed/failed/timed out (traced executions only; <see cref="AuditChannel.ScriptTrace"/>).</summary>
+    ScriptRun,
+
+    /// <summary>One attribute write or batch write made by a traced script (traced executions only; <see cref="AuditChannel.ScriptTrace"/>).</summary>
+    AttributeWrite,
+
+    /// <summary>One <c>WaitAsync</c>/<c>WaitForAsync</c> outcome in a traced script (traced executions only; <see cref="AuditChannel.ScriptTrace"/>).</summary>
+    AttributeWait
 }