Resolve all high-severity architecture review findings

src/ZB.MOM.WW.ScadaBridge.SiteRuntime/Scripts/AuditingDbCommand.cs

@@ -58,6 +58,7 @@ internal sealed class AuditingDbCommand : DbCommand
 
     private readonly ILogger _logger;
     private DbConnection? _wrappingConnection;
+    private DbTransaction? _wrappingTransaction;
 
     /// <summary>
     /// Initializes a new auditing database command decorator.
@@ -171,8 +172,13 @@ internal sealed class AuditingDbCommand : DbCommand
     /// <inheritdoc />
     protected override DbTransaction? DbTransaction
     {
-        get => _inner.Transaction;
-        set => _inner.Transaction = value;
+        get => _inner.Transaction is null ? null : _wrappingTransaction;
+        set
+        {
+            // Preserve the public wrapper, while giving the provider its own transaction.
+            _inner.Transaction = value is AuditingDbTransaction auditing ? auditing.Inner : value;
+            _wrappingTransaction = value;
+        }
     }
 
     /// <inheritdoc />