chore: organize solution into module folders (Core/Server/Drivers/Client/Tooling)

Group all 69 projects into category subfolders under src/ and tests/ so the
Rider Solution Explorer mirrors the module structure. Folders: Core, Server,
Drivers (with a nested Driver CLIs subfolder), Client, Tooling.

- Move every project folder on disk with git mv (history preserved as renames).
- Recompute relative paths in 57 .csproj files: cross-category ProjectReferences,
  the lib/ HintPath+None refs in Driver.Historian.Wonderware, and the external
  mxaccessgw refs in Driver.Galaxy and its test project.
- Rebuild ZB.MOM.WW.OtOpcUa.slnx with nested solution folders.
- Re-prefix project paths in functional scripts (e2e, compliance, smoke SQL,
  integration, install).

Build green (0 errors); unit tests pass. Docs left for a separate pass.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/Server/ZB.MOM.WW.OtOpcUa.Server.Tests/NodeScopeResolverTests.cs

@@ -0,0 +1,104 @@
+using Shouldly;
+using Xunit;
+using ZB.MOM.WW.OtOpcUa.Core.Authorization;
+using ZB.MOM.WW.OtOpcUa.Server.Security;
+
+namespace ZB.MOM.WW.OtOpcUa.Server.Tests;
+
+[Trait("Category", "Unit")]
+public sealed class NodeScopeResolverTests
+{
+    [Fact]
+    public void Resolve_PopulatesClusterAndTag()
+    {
+        var resolver = new NodeScopeResolver("c-warsaw");
+
+        var scope = resolver.Resolve("TestMachine_001/Oven/SetPoint");
+
+        scope.ClusterId.ShouldBe("c-warsaw");
+        scope.TagId.ShouldBe("TestMachine_001/Oven/SetPoint");
+        scope.Kind.ShouldBe(NodeHierarchyKind.Equipment);
+    }
+
+    [Fact]
+    public void Resolve_Leaves_UnsPath_Null_When_NoIndexSupplied()
+    {
+        var resolver = new NodeScopeResolver("c-1");
+
+        var scope = resolver.Resolve("tag-1");
+
+        // Cluster-only fallback path — used pre-ADR-001 and still the active path for
+        // unindexed references (e.g. driver-discovered tags that have no Tag row yet).
+        scope.NamespaceId.ShouldBeNull();
+        scope.UnsAreaId.ShouldBeNull();
+        scope.UnsLineId.ShouldBeNull();
+        scope.EquipmentId.ShouldBeNull();
+    }
+
+    [Fact]
+    public void Resolve_Returns_IndexedScope_When_FullReferenceFound()
+    {
+        var index = new Dictionary<string, NodeScope>
+        {
+            ["plcaddr-01"] = new NodeScope
+            {
+                ClusterId = "c-1", NamespaceId = "ns-plc", UnsAreaId = "area-1",
+                UnsLineId = "line-a", EquipmentId = "eq-oven-3", TagId = "plcaddr-01",
+                Kind = NodeHierarchyKind.Equipment,
+            },
+        };
+        var resolver = new NodeScopeResolver("c-1", index);
+
+        var scope = resolver.Resolve("plcaddr-01");
+
+        scope.UnsAreaId.ShouldBe("area-1");
+        scope.UnsLineId.ShouldBe("line-a");
+        scope.EquipmentId.ShouldBe("eq-oven-3");
+        scope.TagId.ShouldBe("plcaddr-01");
+        scope.NamespaceId.ShouldBe("ns-plc");
+    }
+
+    [Fact]
+    public void Resolve_FallsBack_To_ClusterOnly_When_Reference_NotIndexed()
+    {
+        var index = new Dictionary<string, NodeScope>
+        {
+            ["plcaddr-01"] = new NodeScope { ClusterId = "c-1", TagId = "plcaddr-01", Kind = NodeHierarchyKind.Equipment },
+        };
+        var resolver = new NodeScopeResolver("c-1", index);
+
+        var scope = resolver.Resolve("not-in-index");
+
+        scope.ClusterId.ShouldBe("c-1");
+        scope.TagId.ShouldBe("not-in-index");
+        scope.EquipmentId.ShouldBeNull();
+    }
+
+    [Fact]
+    public void Resolve_Throws_OnEmptyFullReference()
+    {
+        var resolver = new NodeScopeResolver("c-1");
+
+        Should.Throw<ArgumentException>(() => resolver.Resolve(""));
+        Should.Throw<ArgumentException>(() => resolver.Resolve("   "));
+    }
+
+    [Fact]
+    public void Ctor_Throws_OnEmptyClusterId()
+    {
+        Should.Throw<ArgumentException>(() => new NodeScopeResolver(""));
+    }
+
+    [Fact]
+    public void Resolver_IsStateless_AcrossCalls()
+    {
+        var resolver = new NodeScopeResolver("c");
+        var s1 = resolver.Resolve("tag-a");
+        var s2 = resolver.Resolve("tag-b");
+
+        s1.TagId.ShouldBe("tag-a");
+        s2.TagId.ShouldBe("tag-b");
+        s1.ClusterId.ShouldBe("c");
+        s2.ClusterId.ShouldBe("c");
+    }
+}