docs(audit): ScadaBridge C7 review — correct 'six persisted' computed-col wording (5 persisted + IngestedAtUtc non-persisted) + stale perf iteration comment

src/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase/Configurations/AuditLogEntityTypeConfiguration.cs

@@ -8,8 +8,11 @@ namespace ZB.MOM.WW.ScadaBridge.ConfigurationDatabase.Configurations;
 /// <summary>
 /// Maps the C5 (Task 2.5) <see cref="AuditLogRow"/> persistence shape to the central
 /// <c>dbo.AuditLog</c> table: the 10 canonical <c>ZB.MOM.WW.Audit.AuditEvent</c> columns
-/// (writable) plus six read-only, server-side <b>persisted computed columns</b> derived
-/// from <c>DetailsJson</c> via <c>JSON_VALUE</c>. The computed-column SQL and the index
+/// (writable) plus six read-only, server-side <b>computed columns</b> derived from
+/// <c>DetailsJson</c> via <c>JSON_VALUE</c> — five PERSISTED (<c>Kind</c>/<c>Status</c>/
+/// <c>SourceSiteId</c>/<c>ExecutionId</c>/<c>ParentExecutionId</c>) plus <c>IngestedAtUtc</c>
+/// which is computed but NOT persisted (SQL Server forbids PERSISTED on its non-deterministic
+/// <c>SWITCHOFFSET</c> cast). The computed-column SQL and the index
 /// set here mirror the <c>CollapseAuditLogToCanonical</c> migration's
 /// <c>dbo.AuditLog_v2</c> DDL byte-for-byte — keep them in sync.
 /// </summary>

src/ZB.MOM.WW.ScadaBridge.ConfigurationDatabase/Migrations/20260602174346_CollapseAuditLogToCanonical.cs

@@ -46,8 +46,8 @@ namespace ZB.MOM.WW.ScadaBridge.ConfigurationDatabase.Migrations
         protected override void Up(MigrationBuilder migrationBuilder)
         {
             // 1) Create dbo.AuditLog_v2 on the PRESERVED partition scheme. Ten
-            //    canonical columns first (ordinal-stable), then the six persisted
-            //    computed columns. The clustered PK is composite {EventId,
+            //    canonical columns first (ordinal-stable), then the six computed
+            //    columns (five PERSISTED + IngestedAtUtc non-persisted). The clustered PK is composite {EventId,
             //    OccurredAtUtc} (partition-aligned). The computed-column expressions
             //    here are the single source of truth that AuditLogEntityTypeConfiguration
             //    and SwitchOutPartitionAsync's staging table must mirror exactly.