fix(transport): blocker heuristic no longer hard-blocks valid imports — local declarations excluded, denylist extended, template-script findings downgraded to warnings

#05-T19. Import name-resolution findings are now split by origin: template-script
(and attribute-default-expression) references become non-blocking advisory
warnings (ConflictKind.Warning + ImportResult.Warnings) since the design-time
deploy gate re-validates authoritatively; ApiMethod-script references stay hard
errors (SemanticValidationException / ConflictKind.Blocker) as they have no
downstream gate. Names declared locally in a body (Roslyn-parsed local functions
/ methods) are excluded so a script's own helper isn't flagged; KnownNonReferenceNames
extended with common BCL/LINQ/SQL surface. DetectBlockersAsync and
RunSemanticValidationAsync Pass 1 apply the identical split so preview and apply
agree. Rollback/hard-fail tests retargeted to ApiMethods (the still-hard-failing
vehicle). CentralUI preview renders the new Warning badge/advisory.

Claude-Session: https://claude.ai/code/session_01MtdgwpEeCUn6cUA5f1LMPj

src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Pages/Design/TransportImport.razor

@@ -275,6 +275,14 @@
                                     </td>
                                 </tr>
                             }
+                            @if (item.Kind == ConflictKind.Warning && !string.IsNullOrEmpty(item.BlockerReason))
+                            {
+                                <tr>
+                                    <td colspan="6">
+                                        <div class="alert alert-warning small mb-0">@item.BlockerReason</div>
+                                    </td>
+                                </tr>
+                            }
                         }
                     </tbody>
                 </table>
@@ -421,6 +429,7 @@
             ConflictKind.Modified => ("bg-warning text-dark", "Modified"),
             ConflictKind.New => ("bg-success", "New"),
             ConflictKind.Blocker => ("bg-danger", "Blocker"),
+            ConflictKind.Warning => ("bg-warning text-dark", "Warning"),
             _ => ("bg-light text-dark", item.Kind.ToString()),
         };
         <span class="badge @cls">@label</span>
@@ -444,6 +453,13 @@
             <span class="text-muted small">—</span>
             return;
         }
+        // Warning items are advisory "Reference" rows, not importable entities —
+        // no resolution to choose (the import proceeds regardless).
+        if (item.Kind == ConflictKind.Warning)
+        {
+            <span class="text-muted small">—</span>
+            return;
+        }
 
         var key = (item.EntityType, item.Name);