feat(centralui+dcl): Test Bindings popup — one-shot live read of bound tags

Adds a Test Bindings button to the Connection Bindings table on the Configure
Instance page that opens a modal showing the live current value of every bound
attribute. Reuses the routing path that the OPC UA tag browser landed on:

  Central:  TestBindingsDialog → IBindingTester → CommunicationService
            → ReadTagValuesCommand → SiteEnvelope (Ask)
  Site:     SiteCommunicationActor → DeploymentManagerActor singleton
            → DataConnectionManagerActor → child DataConnectionActor
            → _adapter.ReadBatchAsync

Split mirrors the browse handler:
  • Manager owns ConnectionNotFound (only it sees the per-site connection set).
  • Child owns ConnectionNotConnected (pre-call status check, never stash —
    read is interactive design-time), Timeout (OperationCanceledException),
    ServerError (any other exception). Per-tag failures from ReadBatchAsync
    become failure TagReadOutcomes without aborting the batch.

CentralUI:
  • IBindingTester / BindingTester — Design-role guard via HasClaim against
    JwtTokenService.RoleClaimType (not IsInRole — see c1e16cf), typed
    transport-failure translation.
  • TestBindingsDialog — ShowAsync(siteId, rows, instanceLabel) method-arg
    pattern (no Razor parameter race; see 2c138b6), groups rows by connection
    and issues one ReadAsync per connection in parallel, per-row error subline
    + per-connection banner, Refresh button re-issues the reads.
  • InstanceConfigure.razor — Test Bindings button next to Save Bindings,
    disabled when no testable rows. OPC UA only today (other protocols have
    no ReadTagValuesCommand wiring yet).

Tests:
  • Commons: ReadTagValuesCommand discovered by ManagementCommandRegistry.
  • DataConnectionLayer: unknown connection → ConnectionNotFound,
    not-connected adapter → ConnectionNotConnected (ReadBatchAsync NOT called),
    success-path mapping (Good/Bad + per-tag error), cancellation → Timeout.
  • CentralUI: register IBindingTester (and the previously-missing
    IOpcUaBrowseService) on the existing InstanceConfigureAuditDrillinTests
    Bunit container so the page renders cleanly with the new dialog.

src/ZB.MOM.WW.ScadaBridge.CentralUI/ServiceCollectionExtensions.cs

@@ -55,6 +55,13 @@ public static class ServiceCollectionExtensions
         // transport failures into typed BrowseFailure results for the dialog.
         services.AddScoped<IOpcUaBrowseService, OpcUaBrowseService>();
 
+        // Test Bindings: facade over CommunicationService.ReadTagValuesAsync —
+        // same Design-role guard + typed-failure translation as the browse
+        // service. Backs the Test Bindings dialog on the Configure Instance
+        // page (one-shot live read of every bound attribute, grouped by
+        // connection).
+        services.AddScoped<IBindingTester, BindingTester>();
+
         // Roslyn-backed C# analysis for the Monaco script editor.
         // Scoped because SharedScriptCatalog wraps a scoped service.
         services.AddMemoryCache(o => o.SizeLimit = 200);