fix(transport): symmetric blocker-scan fixes in Apply-time validator

RunSemanticValidationAsync's Pass 1 minimal-name-resolution scan
duplicated DetectBlockersAsync's heuristic but had the same two bugs
fixed in the previous two commits: it was scanning
TemplateAttribute.DataSourceReference (an OPC UA address-space path,
not script source) and it was missing the KnownNonReferenceNames
denylist. As a result, an import that passed the diff-step blocker
check would still fail at Apply with the same 30+ identifiers
reappearing as "Bundle semantic validation failed" errors.

Apply the same two fixes here so the diff preview and the Apply-time
validator agree.

src/ScadaLink.Transport/Import/BundleImporter.cs

@@ -1650,8 +1650,12 @@ public sealed class BundleImporter : IBundleImporter
             foreach (var s in t.Scripts) CollectCallIdentifiers(s.Code, referenced);
             foreach (var a in t.Attributes)
             {
+                // Value can hold script-callable design-time expressions;
+                // DataSourceReference is an OPC UA address-space path (e.g.
+                // "ns=3;s=Tank.Level") and must NOT be scanned, or the dot
+                // delimiter will flag tag-path segments as missing references.
+                // Symmetric with DetectBlockersAsync.
                 CollectCallIdentifiers(a.Value, referenced);
-                CollectCallIdentifiers(a.DataSourceReference, referenced);
             }
         }
         foreach (var m in content.ApiMethods)
@@ -1664,6 +1668,7 @@ public sealed class BundleImporter : IBundleImporter
         foreach (var candidate in referenced.OrderBy(n => n, StringComparer.Ordinal))
         {
             if (!LooksLikeResourceName(candidate)) continue;
+            if (KnownNonReferenceNames.Contains(candidate)) continue;
             if (sharedScriptNames.Contains(candidate) || externalSystemNames.Contains(candidate)) continue;
             errors.Add(
                 $"Script references SharedScript or ExternalSystem '{candidate}' not present in bundle or target.");