fix(v3-batch4-wp3): realm-qualified write routing + dormant discovery guard + self-correction/byte-parity tests (Wave B review H1/M1/M2/L1/L3)

H1 (HIGH): write-routing key now (AddressSpaceRealm, bareId), not bare-only.
A raw s=<RawPath> and a UNS s=<Area/Line/Equip/Eff> can collide as bare
strings; the bare-only key let a colliding raw+UNS pair route to the WRONG
driver ref (last-writer-wins). The realm the node manager resolves (RealmOf)
is now threaded through IOpcUaNodeWriteGateway.WriteAsync -> RouteNodeWrite ->
_driverRefByNodeId keyed by (realm, bareId). New regression test:
Colliding_raw_and_uns_bare_ids_route_to_their_own_driver_by_realm.

M1 (MEDIUM): discovered-node injection made coherently DORMANT. HandleDiscoveredNodes
hard-short-circuits (single enforcement point; _discoveredByDriver never
populates so the re-inject tail is inert too), with a clear log pointing at the
/raw browse-commit flow. New pin: Discovered_nodes_are_ignored_dormant_in_v3;
the 16+2 v2 injection scenarios re-pointed to an accurate skip reason
(DiscoveryInjectionDormantV3).

M2 (MEDIUM): realm-qualified dual-node self-correction tests —
Failed_uns_write_reverts_uns_node_and_leaves_raw_node_untouched +
Raw_realm_revert_reverts_raw_node_only (the second fails if the realm is dropped).

L1: removed the = AddressSpaceRealm.Uns defaults from the consequential
node-manager mutation methods (WriteValue/WriteAlarmCondition/MaterialiseAlarmCondition/
EnsureFolder/EnsureVariable/UpdateFolderDisplayName/UpdateTagAttributes/
RaiseNodesAddedModelChange/Remove*/RevertOptimisticWriteIfNeeded) + the
AttributeValueUpdate/AlarmStateUpdate records, so the compiler forces explicit
realm; read-only accessors + internal builders retain their defaults.

L3: fixed the stale VirtualTagHostActor class comment (V3NodeIds.Uns, not the
retired EquipmentNodeIds.Variable).

Also: DeploymentArtifactRawUnsParityTests — Raw/UNS node-set byte-parity
round-trip between AddressSpaceComposer.Compose and DeploymentArtifact.ParseComposition.

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

tests/Server/ZB.MOM.WW.OtOpcUa.Runtime.Tests/Drivers/DiscoveryInjectionEndToEndTests.cs

@@ -108,7 +108,7 @@ public sealed class DiscoveryInjectionEndToEndTests : RuntimeActorTestBase
     ///         <see cref="OpcUaQuality.Good"/> — proving the live value routed end-to-end and (in production)
     ///         overwrote the BadWaitingForInitialData seed.
     /// </summary>
-    [Fact(Skip = DarkAddressSpaceReasons.EquipmentTagsDarkBatch4)]
+    [Fact(Skip = DarkAddressSpaceReasons.DiscoveryInjectionDormantV3)]
     public void Discovered_node_materialises_at_equipment_and_polled_value_flows_Good()
     {
         var db = NewInMemoryDbFactory();
@@ -154,7 +154,7 @@ public sealed class DiscoveryInjectionEndToEndTests : RuntimeActorTestBase
     ///     (re-materialised after the rebuild) at the same NodeId, and a subsequent published value STILL
     ///     <c>WriteValue</c>s Good there (the routing map was rebuilt, not left empty by the Clear()).
     /// </summary>
-    [Fact(Skip = DarkAddressSpaceReasons.EquipmentTagsDarkBatch4)]
+    [Fact(Skip = DarkAddressSpaceReasons.DiscoveryInjectionDormantV3)]
     public void Discovered_node_and_value_survive_a_redeploy()
     {
         var db = NewInMemoryDbFactory();