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/Drivers/DeploymentArtifactScriptedAlarmParityTests.cs

@@ -11,7 +11,7 @@ namespace ZB.MOM.WW.OtOpcUa.Runtime.Tests.Drivers;
 /// <summary>
 ///     Byte-parity tests for the scripted-alarm deployment-artifact decode path
 ///     (<c>DeploymentArtifact.BuildEquipmentScriptedAlarmPlans</c>) against the live compose seam
-///     (<c>Phase7Composer.Compose</c>). Both sides derive <c>EquipmentScriptedAlarmPlan</c> from the
+///     (<c>AddressSpaceComposer.Compose</c>). Both sides derive <c>EquipmentScriptedAlarmPlan</c> from the
 ///     same ScriptedAlarm + Script data via the shared <c>EquipmentScriptPaths.ExtractAlarmDependencyRefs</c>
 ///     helper, so the decoded plans must equal the composer's element-wise (the record has value
 ///     equality including DependencyRefs order). Mirrors the existing EquipmentVirtualTags parity
@@ -70,7 +70,7 @@ public sealed class DeploymentArtifactScriptedAlarmParityTests
             Enabled = false,
         };
 
-        var composed = Phase7Composer.Compose(
+        var composed = AddressSpaceComposer.Compose(
             Array.Empty<UnsArea>(), Array.Empty<UnsLine>(), Array.Empty<Equipment>(),
             Array.Empty<DriverInstance>(), new[] { alarm1, alarm2 },
             Array.Empty<Tag>(), Array.Empty<Namespace>(),
@@ -189,7 +189,7 @@ public sealed class DeploymentArtifactScriptedAlarmParityTests
             Enabled = true,
         };
 
-        var composed = Phase7Composer.Compose(
+        var composed = AddressSpaceComposer.Compose(
             Array.Empty<UnsArea>(), Array.Empty<UnsLine>(), Array.Empty<Equipment>(),
             Array.Empty<DriverInstance>(), new[] { goodAlarm, orphanAlarm },
             Array.Empty<Tag>(), Array.Empty<Namespace>(),