feat(opcua): add ISurgicalAddressSpaceSink + node-manager in-place tag-attribute update (F10b)

src/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer/SdkAddressSpaceSink.cs

@@ -8,7 +8,7 @@ namespace ZB.MOM.WW.OtOpcUa.OpcUaServer;
 ///     <see cref="OtOpcUaNodeManager"/>. The host wires this in once the StandardServer has
 ///     been started (so the node manager exists).
 /// </summary>
-public sealed class SdkAddressSpaceSink : IOpcUaAddressSpaceSink
+public sealed class SdkAddressSpaceSink : IOpcUaAddressSpaceSink, ISurgicalAddressSpaceSink
 {
     private readonly OtOpcUaNodeManager _nodeManager;
 
@@ -65,6 +65,14 @@ public sealed class SdkAddressSpaceSink : IOpcUaAddressSpaceSink
     public void EnsureVariable(string variableNodeId, string? parentFolderNodeId, string displayName, string dataType, bool writable, string? historianTagname = null, bool isArray = false, uint? arrayLength = null)
         => _nodeManager.EnsureVariable(variableNodeId, parentFolderNodeId, displayName, dataType, writable, historianTagname, isArray, arrayLength);
 
+    /// <summary>F10b: surgically update an existing variable node's Writable + Historizing in place
+    /// (no rebuild). Returns false when the node does not exist (caller falls back to a full rebuild).</summary>
+    /// <param name="variableNodeId">The variable node identifier.</param>
+    /// <param name="writable">When true the node becomes read/write with the inbound-write handler; otherwise read-only.</param>
+    /// <param name="historianTagname">null ⇒ not historized; non-null ⇒ Historizing with the HistoryRead bit and tagname binding.</param>
+    public bool UpdateTagAttributes(string variableNodeId, bool writable, string? historianTagname)
+        => _nodeManager.UpdateTagAttributes(variableNodeId, writable, historianTagname);
+
     /// <summary>Rebuilds the entire OPC UA address space.</summary>
     public void RebuildAddressSpace() => _nodeManager.RebuildAddressSpace();
 }