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/DeploymentArtifactEquipTokenTests.cs

@@ -9,7 +9,7 @@ namespace ZB.MOM.WW.OtOpcUa.Runtime.Tests.Drivers;
 ///     Verifies the artifact-decode mirror substitutes the reserved <c>{{equip}}</c> token in a
 ///     VirtualTag script's <c>ctx.GetTag("…")</c> literals with the owning equipment's tag base
 ///     (derived from its child Equipment-namespace tag's FullName) — byte-parity with
-///     <c>Phase7Composer.Compose</c>'s live-edit path, using the same shared
+///     <c>AddressSpaceComposer.Compose</c>'s live-edit path, using the same shared
 ///     <c>EquipmentScriptPaths</c> helper and the same equipmentTags-derived base.
 /// </summary>
 public sealed class DeploymentArtifactEquipTokenTests