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.

tests/Server/ZB.MOM.WW.OtOpcUa.Runtime.Tests/OpcUa/OpcUaPublishActorRebuildTests.cs

@@ -24,7 +24,7 @@ public sealed class OpcUaPublishActorRebuildTests : RuntimeActorTestBase
     {
         var db = NewInMemoryDbFactory();
         var sink = new RecordingSink();
-        var applier = new Phase7Applier(sink, NullLogger<Phase7Applier>.Instance);
+        var applier = new AddressSpaceApplier(sink, NullLogger<AddressSpaceApplier>.Instance);
 
         SeedDeployment(db, equipmentIds: new[] { "eq-1", "eq-2" }, driverIds: new[] { "drv-1" });
 
@@ -49,7 +49,7 @@ public sealed class OpcUaPublishActorRebuildTests : RuntimeActorTestBase
     {
         var db = NewInMemoryDbFactory();
         var sink = new RecordingSink();
-        var applier = new Phase7Applier(sink, NullLogger<Phase7Applier>.Instance);
+        var applier = new AddressSpaceApplier(sink, NullLogger<AddressSpaceApplier>.Instance);
 
         // No deployment seeded — LoadLatestArtifact returns empty blob.
         var actor = Sys.ActorOf(OpcUaPublishActor.PropsForTests(
@@ -69,7 +69,7 @@ public sealed class OpcUaPublishActorRebuildTests : RuntimeActorTestBase
     {
         var db = NewInMemoryDbFactory();
         var sink = new RecordingSink();
-        var applier = new Phase7Applier(sink, NullLogger<Phase7Applier>.Instance);
+        var applier = new AddressSpaceApplier(sink, NullLogger<AddressSpaceApplier>.Instance);
         SeedDeployment(db, equipmentIds: new[] { "eq-1" }, driverIds: Array.Empty<string>());
 
         var actor = Sys.ActorOf(OpcUaPublishActor.PropsForTests(
@@ -114,7 +114,7 @@ public sealed class OpcUaPublishActorRebuildTests : RuntimeActorTestBase
         // --- SITE-A node: only the SITE-A tag's variable, never MAIN's. ---
         var dbA = NewInMemoryDbFactory();
         var sinkA = new RecordingSink();
-        var applierA = new Phase7Applier(sinkA, NullLogger<Phase7Applier>.Instance);
+        var applierA = new AddressSpaceApplier(sinkA, NullLogger<AddressSpaceApplier>.Instance);
         SeedMultiClusterDeployment(dbA);
 
         var siteActor = Sys.ActorOf(OpcUaPublishActor.PropsForTests(
@@ -134,7 +134,7 @@ public sealed class OpcUaPublishActorRebuildTests : RuntimeActorTestBase
         // --- MAIN node: the mirror — only MAIN's tag's variable, never SITE-A's. ---
         var dbM = NewInMemoryDbFactory();
         var sinkM = new RecordingSink();
-        var applierM = new Phase7Applier(sinkM, NullLogger<Phase7Applier>.Instance);
+        var applierM = new AddressSpaceApplier(sinkM, NullLogger<AddressSpaceApplier>.Instance);
         SeedMultiClusterDeployment(dbM);
 
         var mainActor = Sys.ActorOf(OpcUaPublishActor.PropsForTests(