fix(opcua): forward ISurgicalAddressSpaceSink through DeferredAddressSpaceSink (F10b surgical path was inert in prod)

src/Core/ZB.MOM.WW.OtOpcUa.Commons/OpcUa/DeferredAddressSpaceSink.cs

@@ -12,7 +12,7 @@ namespace ZB.MOM.WW.OtOpcUa.Commons.OpcUa;
 ///     no-op against <see cref="NullOpcUaAddressSpaceSink"/>, so the actor stays safe to
 ///     receive messages from the moment it boots.
 /// </summary>
-public sealed class DeferredAddressSpaceSink : IOpcUaAddressSpaceSink
+public sealed class DeferredAddressSpaceSink : IOpcUaAddressSpaceSink, ISurgicalAddressSpaceSink
 {
     private volatile IOpcUaAddressSpaceSink _inner = NullOpcUaAddressSpaceSink.Instance;
 
@@ -69,4 +69,17 @@ public sealed class DeferredAddressSpaceSink : IOpcUaAddressSpaceSink
 
     /// <summary>Rebuilds the address space through the inner sink.</summary>
     public void RebuildAddressSpace() => _inner.RebuildAddressSpace();
+
+    /// <summary>Forwards an in-place tag-attribute update (F10b) to the inner sink when it supports the
+    /// surgical capability. Returns false otherwise — before the real <c>SdkAddressSpaceSink</c> is
+    /// swapped in (inner is still the null sink), or any inner sink that isn't surgical — so the caller
+    /// (Phase7Applier) falls back to a full rebuild. Without this forward the surgical optimization is
+    /// inert on every driver-role host, because actors inject THIS wrapper, not the inner sink.</summary>
+    /// <param name="variableNodeId">The node ID of the variable to update in place.</param>
+    /// <param name="writable">Whether the node should be read/write.</param>
+    /// <param name="historianTagname">null ⇒ not historized; non-null ⇒ Historizing + historian binding.</param>
+    /// <returns>True when the inner sink applied the update; false when it lacks the capability or the node is missing.</returns>
+    public bool UpdateTagAttributes(string variableNodeId, bool writable, string? historianTagname)
+        => _inner is ISurgicalAddressSpaceSink surgical
+           && surgical.UpdateTagAttributes(variableNodeId, writable, historianTagname);
 }