feat(v3-batch4-wp3): raw-only binding + UNS fan-out + write routing

Wave B of Batch 4 — the runtime binding seam for the dual namespace.

Applier (both realms, explicit realm at every sink call site):
- MaterialiseRawSubtree: Raw containers as folders + Raw tags as variables
  keyed by RawPath (native-alarm tag → single Part 9 condition at the RawPath),
  all in AddressSpaceRealm.Raw; historian tagname = override else RawPath.
- MaterialiseUnsReferences: each UNS reference Variable under its equipment
  folder (Uns realm) + an Organizes UNS->Raw edge; inherits writable/array/
  historian tagname from the backing raw tag (both NodeIds -> one tagname).
- FeedHistorizedRefs / ProvisionHistorizedTags now source RAW tags (mux ref
  stays single, keyed by RawPath); ApplyPureRemove tears down raw tags + UNS
  refs in place (raw-container removal falls back to rebuild).

DriverHostActor (dual-NodeId, single-source fan-out):
- _nodeIdByDriverRef value gains a realm (NodeRealmRef); rebuilt from
  RawTags UNION UnsReferenceVariables so one (DriverInstanceId, RawPath) fans
  to the raw NodeId AND every referencing UNS NodeId with identical
  value/quality/timestamp. Write inverse map keyed by the bare id; the
  ns-qualified NodeId the write hook passes is normalised (BareNodeId) so a
  write to either NodeId resolves the same driver ref (-> RawPath write).
- Native raw alarm condition routing is realm-tagged (Raw); AttributeValueUpdate
  + AlarmStateUpdate carry the realm through to the sink.

Retire EquipmentNodeIds -> V3NodeIds.Uns (applier/VirtualTagHostActor) and
RawPaths.Combine (DiscoveredNodeMapper, discovered nodes are Raw now).

DeploymentArtifact.ParseComposition emits the Raw + UNS subtrees byte-parity
with the composer (reconstruct entities -> AddressSpaceComposer.Compose).

Sink surface: removed the transitional `= AddressSpaceRealm.Uns` defaults from
IOpcUaAddressSpaceSink / ISurgicalAddressSpaceSink / SdkAddressSpaceSink /
DeferredAddressSpaceSink / NullOpcUaAddressSpaceSink — every call site is now
explicit (realm reordered before the trailing optionals on EnsureVariable +
MaterialiseAlarmCondition). Node-manager convenience methods keep their
defaults (they are not the interface impl; Sdk delegates explicitly).

Tests: rewrote DriverHostActorLiveValueTests (fan-out drift, 1:N) +
DriverHostActorWriteRoutingTests (dual-NodeId raw/uns write routing) to the v3
raw+uns model; new AddressSpaceApplierRawUnsTests; migrated the EquipmentTags
provisioning/feed tests to RawTags; swept EquipmentNodeIds test callers.

Claude-Session: https://claude.ai/code/session_01LVneM3eh1UtJxEisFXgmox

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

@@ -24,8 +24,7 @@ public interface ISurgicalAddressSpaceSink
     /// <param name="realm">The namespace realm <paramref name="variableNodeId"/> lives in — the sink resolves the
     /// namespace index from the realm rather than parsing it out of the id string.</param>
     /// <returns>True when the in-place update was applied; false when the node is missing (caller rebuilds).</returns>
-    // transitional default — B4-WP3/Wave B makes every call site explicit and removes this default.
-    bool UpdateTagAttributes(string variableNodeId, bool writable, string? historianTagname, string dataType, bool isArray, uint? arrayLength, AddressSpaceRealm realm = AddressSpaceRealm.Uns);
+    bool UpdateTagAttributes(string variableNodeId, bool writable, string? historianTagname, string dataType, bool isArray, uint? arrayLength, AddressSpaceRealm realm);
 
     /// <summary>Update an existing folder node's <c>DisplayName</c> IN PLACE, notifying subscribers
     /// (ClearChangeMasks) without a rebuild — used by AddressSpaceApplier to apply a UNS Area / Line
@@ -37,8 +36,7 @@ public interface ISurgicalAddressSpaceSink
     /// <param name="displayName">The new display name to apply.</param>
     /// <param name="realm">The namespace realm <paramref name="folderNodeId"/> lives in.</param>
     /// <returns>True when the in-place update was applied; false when the folder is missing (caller rebuilds).</returns>
-    // transitional default — B4-WP3/Wave B makes every call site explicit and removes this default.
-    bool UpdateFolderDisplayName(string folderNodeId, string displayName, AddressSpaceRealm realm = AddressSpaceRealm.Uns);
+    bool UpdateFolderDisplayName(string folderNodeId, string displayName, AddressSpaceRealm realm);
 
     /// <summary>Remove ONE existing value-variable node IN PLACE (detach from its parent, drop it from the
     /// predefined-node set, drop any historized-tagname registration), then raise a Part 3
@@ -50,8 +48,7 @@ public interface ISurgicalAddressSpaceSink
     /// <param name="variableNodeId">The folder-scoped node id of the variable to remove in place.</param>
     /// <param name="realm">The namespace realm <paramref name="variableNodeId"/> lives in.</param>
     /// <returns>True when the node was removed; false when the id is unknown (caller rebuilds).</returns>
-    // transitional default — B4-WP3/Wave B makes every call site explicit and removes this default.
-    bool RemoveVariableNode(string variableNodeId, AddressSpaceRealm realm = AddressSpaceRealm.Uns);
+    bool RemoveVariableNode(string variableNodeId, AddressSpaceRealm realm);
 
     /// <summary>Remove ONE existing Part 9 alarm-condition node IN PLACE (detach, drop from the
     /// predefined-node set, clear the native-alarm flag), then raise NodeDeleted outside the lock. The
@@ -61,8 +58,7 @@ public interface ISurgicalAddressSpaceSink
     /// <param name="alarmNodeId">The alarm condition node id (== ScriptedAlarmId, or a native alarm tag's folder-scoped id).</param>
     /// <param name="realm">The namespace realm <paramref name="alarmNodeId"/> lives in.</param>
     /// <returns>True when the condition was removed; false when the id is unknown (caller rebuilds).</returns>
-    // transitional default — B4-WP3/Wave B makes every call site explicit and removes this default.
-    bool RemoveAlarmConditionNode(string alarmNodeId, AddressSpaceRealm realm = AddressSpaceRealm.Uns);
+    bool RemoveAlarmConditionNode(string alarmNodeId, AddressSpaceRealm realm);
 
     /// <summary>Remove an equipment folder AND its entire descendant subtree (sub-folders, value variables,
     /// condition nodes) IN PLACE: per-descendant map/registration cleanup (variables, historized tagnames,
@@ -73,6 +69,5 @@ public interface ISurgicalAddressSpaceSink
     /// <param name="equipmentNodeId">The equipment folder node id whose entire subtree to remove.</param>
     /// <param name="realm">The namespace realm <paramref name="equipmentNodeId"/> lives in.</param>
     /// <returns>True when the subtree was removed; false when the id is unknown (caller rebuilds).</returns>
-    // transitional default — B4-WP3/Wave B makes every call site explicit and removes this default.
-    bool RemoveEquipmentSubtree(string equipmentNodeId, AddressSpaceRealm realm = AddressSpaceRealm.Uns);
+    bool RemoveEquipmentSubtree(string equipmentNodeId, AddressSpaceRealm realm);
 }