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/Client/ZB.MOM.WW.OtOpcUa.Client.Shared.Tests/Models/ModelConstructionTests.cs

@@ -0,0 +1,130 @@
+using Opc.Ua;
+using Shouldly;
+using Xunit;
+using ZB.MOM.WW.OtOpcUa.Client.Shared.Models;
+using BrowseResult = ZB.MOM.WW.OtOpcUa.Client.Shared.Models.BrowseResult;
+
+namespace ZB.MOM.WW.OtOpcUa.Client.Shared.Tests.Models;
+
+public class ModelConstructionTests
+{
+    [Fact]
+    public void BrowseResult_ConstructsCorrectly()
+    {
+        var result = new BrowseResult("ns=2;s=MyNode", "MyNode", "Variable", true);
+
+        result.NodeId.ShouldBe("ns=2;s=MyNode");
+        result.DisplayName.ShouldBe("MyNode");
+        result.NodeClass.ShouldBe("Variable");
+        result.HasChildren.ShouldBeTrue();
+    }
+
+    [Fact]
+    public void BrowseResult_WithoutChildren()
+    {
+        var result = new BrowseResult("ns=2;s=Leaf", "Leaf", "Variable", false);
+        result.HasChildren.ShouldBeFalse();
+    }
+
+    [Fact]
+    public void AlarmEventArgs_ConstructsCorrectly()
+    {
+        var time = new DateTime(2026, 1, 15, 10, 30, 0, DateTimeKind.Utc);
+        var args = new AlarmEventArgs("Source1", "HighTemp", 500, "Temperature high", true, true, false, time);
+
+        args.SourceName.ShouldBe("Source1");
+        args.ConditionName.ShouldBe("HighTemp");
+        args.Severity.ShouldBe((ushort)500);
+        args.Message.ShouldBe("Temperature high");
+        args.Retain.ShouldBeTrue();
+        args.ActiveState.ShouldBeTrue();
+        args.AckedState.ShouldBeFalse();
+        args.Time.ShouldBe(time);
+    }
+
+    [Fact]
+    public void RedundancyInfo_ConstructsCorrectly()
+    {
+        var uris = new[] { "urn:server1", "urn:server2" };
+        var info = new RedundancyInfo("Warm", 200, uris, "urn:server1");
+
+        info.Mode.ShouldBe("Warm");
+        info.ServiceLevel.ShouldBe((byte)200);
+        info.ServerUris.ShouldBe(uris);
+        info.ApplicationUri.ShouldBe("urn:server1");
+    }
+
+    [Fact]
+    public void RedundancyInfo_WithEmptyUris()
+    {
+        var info = new RedundancyInfo("None", 0, [], string.Empty);
+        info.ServerUris.ShouldBeEmpty();
+        info.ApplicationUri.ShouldBeEmpty();
+    }
+
+    [Fact]
+    public void DataChangedEventArgs_ConstructsCorrectly()
+    {
+        var value = new DataValue(new Variant(42), StatusCodes.Good);
+        var args = new DataChangedEventArgs("ns=2;s=Temp", value);
+
+        args.NodeId.ShouldBe("ns=2;s=Temp");
+        args.Value.ShouldBe(value);
+        args.Value.Value.ShouldBe(42);
+    }
+
+    [Fact]
+    public void ConnectionStateChangedEventArgs_ConstructsCorrectly()
+    {
+        var args = new ConnectionStateChangedEventArgs(
+            ConnectionState.Disconnected, ConnectionState.Connected, "opc.tcp://localhost:4840");
+
+        args.OldState.ShouldBe(ConnectionState.Disconnected);
+        args.NewState.ShouldBe(ConnectionState.Connected);
+        args.EndpointUrl.ShouldBe("opc.tcp://localhost:4840");
+    }
+
+    [Fact]
+    public void ConnectionInfo_ConstructsCorrectly()
+    {
+        var info = new ConnectionInfo(
+            "opc.tcp://localhost:4840",
+            "TestServer",
+            "None",
+            "http://opcfoundation.org/UA/SecurityPolicy#None",
+            "ns=0;i=12345",
+            "TestSession");
+
+        info.EndpointUrl.ShouldBe("opc.tcp://localhost:4840");
+        info.ServerName.ShouldBe("TestServer");
+        info.SecurityMode.ShouldBe("None");
+        info.SecurityPolicyUri.ShouldBe("http://opcfoundation.org/UA/SecurityPolicy#None");
+        info.SessionId.ShouldBe("ns=0;i=12345");
+        info.SessionName.ShouldBe("TestSession");
+    }
+
+    [Fact]
+    public void SecurityMode_Enum_HasExpectedValues()
+    {
+        Enum.GetValues<SecurityMode>().Length.ShouldBe(3);
+        ((int)SecurityMode.None).ShouldBe(0);
+        ((int)SecurityMode.Sign).ShouldBe(1);
+        ((int)SecurityMode.SignAndEncrypt).ShouldBe(2);
+    }
+
+    [Fact]
+    public void ConnectionState_Enum_HasExpectedValues()
+    {
+        Enum.GetValues<ConnectionState>().Length.ShouldBe(4);
+        ((int)ConnectionState.Disconnected).ShouldBe(0);
+        ((int)ConnectionState.Connecting).ShouldBe(1);
+        ((int)ConnectionState.Connected).ShouldBe(2);
+        ((int)ConnectionState.Reconnecting).ShouldBe(3);
+    }
+
+    [Fact]
+    public void AggregateType_Enum_HasExpectedValues()
+    {
+        Enum.GetValues<AggregateType>().Length.ShouldBe(7);
+    }
+}