refactor(browse): rename BrowseOpcUaNode* to protocol-agnostic BrowseNode*

Renames BrowseOpcUaNodeCommand/Result -> BrowseNodeCommand/Result and
CommunicationService.BrowseOpcUaNodeAsync -> BrowseNodeAsync across Commons,
Communication, SiteRuntime, DCL actors, and CentralUI. Wire manifest name
follows (BrowseOpcUaNode -> BrowseNode). Browse regression tests green.

src/ZB.MOM.WW.ScadaBridge.Communication/CommunicationService.cs

@@ -360,13 +360,13 @@ public class CommunicationService
     /// <param name="command">The OPC UA browse command.</param>
     /// <param name="cancellationToken">Cancellation token.</param>
     /// <returns>The browse result (children + truncation flag + structured failure).</returns>
-    public Task<BrowseOpcUaNodeResult> BrowseOpcUaNodeAsync(
+    public Task<BrowseNodeResult> BrowseNodeAsync(
         string siteId,
-        BrowseOpcUaNodeCommand command,
+        BrowseNodeCommand command,
         CancellationToken cancellationToken = default)
     {
         var envelope = new SiteEnvelope(siteId, command);
-        return GetActor().Ask<BrowseOpcUaNodeResult>(
+        return GetActor().Ask<BrowseNodeResult>(
             envelope, _options.QueryTimeout, cancellationToken);
     }
 
@@ -377,7 +377,7 @@ public class CommunicationService
     /// server backing the given data connection. Used by the CentralUI "Test
     /// Bindings" dialog on the Configure Instance page. The Ask is bounded by
     /// <see cref="CommunicationOptions.QueryTimeout"/> — same latency budget
-    /// as <see cref="BrowseOpcUaNodeAsync"/> (both are interactive one-shot
+    /// as <see cref="BrowseNodeAsync"/> (both are interactive one-shot
     /// design-time queries).
     /// </summary>
     /// <param name="siteId">The target site identifier.</param>