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>

src/Client/ZB.MOM.WW.OtOpcUa.Client.Shared/Models/RedundancyInfo.cs

@@ -0,0 +1,27 @@
+namespace ZB.MOM.WW.OtOpcUa.Client.Shared.Models;
+
+/// <summary>
+///     Redundancy information read from the server.
+/// </summary>
+public sealed class RedundancyInfo
+{
+    public RedundancyInfo(string mode, byte serviceLevel, string[] serverUris, string applicationUri)
+    {
+        Mode = mode;
+        ServiceLevel = serviceLevel;
+        ServerUris = serverUris;
+        ApplicationUri = applicationUri;
+    }
+
+    /// <summary>The redundancy mode (e.g., "None", "Cold", "Warm", "Hot").</summary>
+    public string Mode { get; }
+
+    /// <summary>The server's current service level (0-255).</summary>
+    public byte ServiceLevel { get; }
+
+    /// <summary>URIs of all servers in the redundant set.</summary>
+    public string[] ServerUris { get; }
+
+    /// <summary>The application URI of the connected server.</summary>
+    public string ApplicationUri { get; }
+}