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/Server/ZB.MOM.WW.OtOpcUa.Admin/Components/Pages/Clusters/Generations.razor

@@ -0,0 +1,73 @@
+@using ZB.MOM.WW.OtOpcUa.Admin.Services
+@using ZB.MOM.WW.OtOpcUa.Configuration.Entities
+@using ZB.MOM.WW.OtOpcUa.Configuration.Enums
+@inject GenerationService GenerationSvc
+@inject NavigationManager Nav
+
+<h4>Generations</h4>
+
+@if (_generations is null) { <p>Loading…</p> }
+else if (_generations.Count == 0) { <p class="text-muted">No generations in this cluster yet.</p> }
+else
+{
+    <table class="table table-sm">
+        <thead>
+            <tr><th>ID</th><th>Status</th><th>Created</th><th>Published</th><th>PublishedBy</th><th>Notes</th><th></th></tr>
+        </thead>
+        <tbody>
+        @foreach (var g in _generations)
+        {
+            <tr>
+                <td><code>@g.GenerationId</code></td>
+                <td>@StatusBadge(g.Status)</td>
+                <td><small>@g.CreatedAt.ToString("u") by @g.CreatedBy</small></td>
+                <td><small>@(g.PublishedAt?.ToString("u") ?? "-")</small></td>
+                <td><small>@g.PublishedBy</small></td>
+                <td><small>@g.Notes</small></td>
+                <td>
+                    @if (g.Status == GenerationStatus.Draft)
+                    {
+                        <a class="btn btn-sm btn-primary" href="/clusters/@ClusterId/draft/@g.GenerationId">Open</a>
+                    }
+                    else if (g.Status is GenerationStatus.Published or GenerationStatus.Superseded)
+                    {
+                        <button class="btn btn-sm btn-outline-warning" @onclick="() => RollbackAsync(g.GenerationId)">Roll back to this</button>
+                    }
+                </td>
+            </tr>
+        }
+        </tbody>
+    </table>
+}
+
+@if (_error is not null) { <div class="alert alert-danger">@_error</div> }
+
+@code {
+    [Parameter] public string ClusterId { get; set; } = string.Empty;
+    private List<ConfigGeneration>? _generations;
+    private string? _error;
+
+    protected override async Task OnParametersSetAsync() => await ReloadAsync();
+
+    private async Task ReloadAsync() =>
+        _generations = await GenerationSvc.ListRecentAsync(ClusterId, 100, CancellationToken.None);
+
+    private async Task RollbackAsync(long targetId)
+    {
+        _error = null;
+        try
+        {
+            await GenerationSvc.RollbackAsync(ClusterId, targetId, notes: $"Rollback via Admin UI", CancellationToken.None);
+            await ReloadAsync();
+        }
+        catch (Exception ex) { _error = ex.Message; }
+    }
+
+    private static MarkupString StatusBadge(GenerationStatus s) => s switch
+    {
+        GenerationStatus.Draft      => new MarkupString("<span class='badge bg-info'>Draft</span>"),
+        GenerationStatus.Published  => new MarkupString("<span class='badge bg-success'>Published</span>"),
+        GenerationStatus.Superseded => new MarkupString("<span class='badge bg-secondary'>Superseded</span>"),
+        _                           => new MarkupString($"<span class='badge bg-light text-dark'>{s}</span>"),
+    };
+}