fix(dcl): format ArrayValue objects as comma-separated strings for display

ArrayValue from LmxProxy client was showing as type name in debug views.
Added ValueFormatter utility and NormalizeValue in LmxProxyDataConnection
to convert arrays at the adapter boundary. DateTime arrays remain as
"System.DateTime[]" due to server-side v1 string serialization.

src/ScadaLink.CentralUI/Components/Pages/Deployment/DebugView.razor

@@ -5,6 +5,7 @@
 @using ScadaLink.Commons.Interfaces.Repositories
 @using ScadaLink.Commons.Messages.DebugView
 @using ScadaLink.Commons.Messages.Streaming
+@using ScadaLink.Commons.Types
 @using ScadaLink.Commons.Types.Enums
 @using ScadaLink.Communication
 @attribute [Authorize(Policy = AuthorizationPolicies.RequireDeployment)]
@@ -91,7 +92,7 @@
                                     {
                                         <tr>
                                             <td class="small">@av.AttributeName</td>
-                                            <td class="small font-monospace"><strong>@av.Value</strong></td>
+                                            <td class="small font-monospace"><strong>@ValueFormatter.FormatDisplayValue(av.Value)</strong></td>
                                             <td>
                                                 <span class="badge @(av.Quality == "Good" ? "bg-success" : "bg-warning text-dark")">@av.Quality</span>
                                             </td>