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.AdminUI/ScriptAnalysis/ScriptAnalysisService.cs

@@ -223,7 +223,7 @@ public sealed class ScriptAnalysisService
         if (inv.Expression is not MemberAccessExpressionSyntax ma) return false;
         // Receiver guard: only ctx.GetTag(...) / ctx.SetVirtualTag(...) are real tag-path calls. Mirrors the
         // runtime harvest (EquipmentScriptPaths.GetTagRefRegex is syntactically `ctx`-anchored), so the editor
-        // offers tag completions/hover for exactly what Phase7Composer harvests — not an unrelated x.GetTag(...).
+        // offers tag completions/hover for exactly what AddressSpaceComposer harvests — not an unrelated x.GetTag(...).
         if (ma.Expression is not IdentifierNameSyntax { Identifier.ValueText: "ctx" }) return false;
         var method = ma.Name.Identifier.ValueText;
         if (method is not ("GetTag" or "SetVirtualTag")) return false;