refactor(opcuaserver): rename Phase7* address-space pipeline to AddressSpace*

The OPC UA address-space build pipeline was named after a v2-roadmap
milestone number rather than its domain. Rename the family to describe
what it does (build/diff/apply the OPC UA address space):

  Phase7Composer          -> AddressSpaceComposer
  Phase7CompositionResult -> AddressSpaceComposition
  Phase7Planner           -> AddressSpacePlanner
  Phase7Plan              -> AddressSpacePlan
  Phase7Applier           -> AddressSpaceApplier
  Phase7ApplyOutcome      -> AddressSpaceApplyOutcome

The 9 Phase7*Tests suites follow suit; Phase7ScriptingEntitiesTests ->
ScriptingEntitiesTests (it tests the scripting migration, not the
pipeline). Log-message prefixes move to the new class names.

Pure mechanical rename, no behavioral change. EF migration classes/IDs
(AddPhase7ScriptingTables, ExtendComputeGenerationDiffWithPhase7) are
immutable and left untouched, as are historical design docs.

Build clean; OpcUaServer 261/261, Runtime 272/272, ScriptingEntities
12/12 green.

src/Server/ZB.MOM.WW.OtOpcUa.Runtime/OpcUa/OpcUaPublishActor.cs

@@ -63,7 +63,7 @@ public sealed class OpcUaPublishActor : ReceiveActor, IWithTimers
     private readonly bool _subscribeRedundancyTopic;
     private readonly NodeId? _localNode;
     private readonly IDbContextFactory<OtOpcUaConfigDbContext>? _dbFactory;
-    private readonly Phase7Applier? _applier;
+    private readonly AddressSpaceApplier? _applier;
     private readonly IActorRef? _dbHealthProbe;
     private readonly TimeSpan _staleWindow;
     private readonly TimeSpan _probeFreshnessWindow;
@@ -77,7 +77,7 @@ public sealed class OpcUaPublishActor : ReceiveActor, IWithTimers
     private DbHealthProbeActor.DbHealthStatus? _lastDbHealth;
     private RedundancyStateChanged? _lastSnapshot;
     private (bool Ok, DateTime At)? _probeAboutMe;
-    private Phase7CompositionResult _lastApplied = new(
+    private AddressSpaceComposition _lastApplied = new(
         Array.Empty<UnsAreaProjection>(),
         Array.Empty<UnsLineProjection>(),
         Array.Empty<EquipmentNode>(),
@@ -116,7 +116,7 @@ public sealed class OpcUaPublishActor : ReceiveActor, IWithTimers
         IServiceLevelPublisher? serviceLevel = null,
         NodeId? localNode = null,
         IDbContextFactory<OtOpcUaConfigDbContext>? dbFactory = null,
-        Phase7Applier? applier = null,
+        AddressSpaceApplier? applier = null,
         IActorRef? dbHealthProbe = null,
         TimeSpan? staleWindow = null,
         TimeSpan? probeFreshnessWindow = null,
@@ -157,7 +157,7 @@ public sealed class OpcUaPublishActor : ReceiveActor, IWithTimers
         bool subscribeRedundancyTopic = false,
         NodeId? localNode = null,
         IDbContextFactory<OtOpcUaConfigDbContext>? dbFactory = null,
-        Phase7Applier? applier = null,
+        AddressSpaceApplier? applier = null,
         IActorRef? dbHealthProbe = null,
         TimeSpan? staleWindow = null,
         TimeSpan? probeFreshnessWindow = null,
@@ -197,7 +197,7 @@ public sealed class OpcUaPublishActor : ReceiveActor, IWithTimers
         bool subscribeRedundancyTopic,
         NodeId? localNode,
         IDbContextFactory<OtOpcUaConfigDbContext>? dbFactory = null,
-        Phase7Applier? applier = null,
+        AddressSpaceApplier? applier = null,
         IActorRef? dbHealthProbe = null,
         TimeSpan? staleWindow = null,
         TimeSpan? probeFreshnessWindow = null,
@@ -308,7 +308,7 @@ public sealed class OpcUaPublishActor : ReceiveActor, IWithTimers
                 ? DeploymentArtifact.ParseComposition(artifact, ln.Value,
                     inconsistency => _log.Warning("OpcUaPublish {Node}: cross-cluster binding — {Message}", ln, inconsistency))
                 : DeploymentArtifact.ParseComposition(artifact);
-            var plan = Phase7Planner.Compute(_lastApplied, composition);
+            var plan = AddressSpacePlanner.Compute(_lastApplied, composition);
 
             if (plan.IsEmpty)
             {
@@ -321,7 +321,7 @@ public sealed class OpcUaPublishActor : ReceiveActor, IWithTimers
             _lastApplied = composition;
 
             // #85 — after the plan diff lands, rebuild the UNS folder hierarchy so OPC UA
-            // clients see Area/Line/Equipment as proper folders. Idempotent; Phase7Applier
+            // clients see Area/Line/Equipment as proper folders. Idempotent; AddressSpaceApplier
             // skips folders that already exist with the same node id.
             _applier.MaterialiseHierarchy(composition);
             // T14 — scripted alarms get their own pass right after the hierarchy so the equipment