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/Reservations.razor

@@ -0,0 +1,114 @@
+@page "/reservations"
+@using ZB.MOM.WW.OtOpcUa.Admin.Services
+@using ZB.MOM.WW.OtOpcUa.Configuration.Entities
+@using Microsoft.AspNetCore.Authorization
+@attribute [Authorize(Policy = "CanPublish")]
+@inject ReservationService ReservationSvc
+
+<h1 class="mb-4">External-ID reservations</h1>
+<p class="text-muted">
+    Fleet-wide ZTag + SAPID reservation state (decision #124). Releasing a reservation is a
+    FleetAdmin-only audit-logged action — only release when the physical asset is permanently
+    retired and its ID needs to be reused by a different equipment.
+</p>
+
+<h4 class="mt-4">Active</h4>
+@if (_active is null) { <p>Loading…</p> }
+else if (_active.Count == 0) { <p class="text-muted">No active reservations.</p> }
+else
+{
+    <table class="table table-sm">
+        <thead><tr><th>Kind</th><th>Value</th><th>EquipmentUuid</th><th>Cluster</th><th>First published</th><th>Last published</th><th></th></tr></thead>
+        <tbody>
+        @foreach (var r in _active)
+        {
+            <tr>
+                <td><code>@r.Kind</code></td>
+                <td><code>@r.Value</code></td>
+                <td><code>@r.EquipmentUuid</code></td>
+                <td>@r.ClusterId</td>
+                <td><small>@r.FirstPublishedAt.ToString("u") by @r.FirstPublishedBy</small></td>
+                <td><small>@r.LastPublishedAt.ToString("u")</small></td>
+                <td><button class="btn btn-sm btn-outline-danger" @onclick='() => OpenReleaseDialog(r)'>Release…</button></td>
+            </tr>
+        }
+        </tbody>
+    </table>
+}
+
+<h4 class="mt-4">Released (most recent 100)</h4>
+@if (_released is null) { <p>Loading…</p> }
+else if (_released.Count == 0) { <p class="text-muted">No released reservations yet.</p> }
+else
+{
+    <table class="table table-sm">
+        <thead><tr><th>Kind</th><th>Value</th><th>Released at</th><th>By</th><th>Reason</th></tr></thead>
+        <tbody>
+        @foreach (var r in _released)
+        {
+            <tr><td><code>@r.Kind</code></td><td><code>@r.Value</code></td><td>@r.ReleasedAt?.ToString("u")</td><td>@r.ReleasedBy</td><td>@r.ReleaseReason</td></tr>
+        }
+        </tbody>
+    </table>
+}
+
+@if (_releasing is not null)
+{
+    <div class="modal show d-block" tabindex="-1" style="background-color: rgba(0,0,0,0.5);">
+        <div class="modal-dialog">
+            <div class="modal-content">
+                <div class="modal-header">
+                    <h5 class="modal-title">Release reservation <code>@_releasing.Kind</code> = <code>@_releasing.Value</code></h5>
+                </div>
+                <div class="modal-body">
+                    <p>This makes the (Kind, Value) pair available for a different EquipmentUuid in a future publish. Audit-logged.</p>
+                    <label class="form-label">Reason (required)</label>
+                    <textarea class="form-control" rows="3" @bind="_reason"></textarea>
+                    @if (_error is not null) { <div class="alert alert-danger mt-2">@_error</div> }
+                </div>
+                <div class="modal-footer">
+                    <button class="btn btn-secondary" @onclick='() => _releasing = null'>Cancel</button>
+                    <button class="btn btn-danger" @onclick="ReleaseAsync" disabled="@_busy">Release</button>
+                </div>
+            </div>
+        </div>
+    </div>
+}
+
+@code {
+    private List<ExternalIdReservation>? _active;
+    private List<ExternalIdReservation>? _released;
+    private ExternalIdReservation? _releasing;
+    private string _reason = string.Empty;
+    private bool _busy;
+    private string? _error;
+
+    protected override async Task OnInitializedAsync() => await ReloadAsync();
+
+    private async Task ReloadAsync()
+    {
+        _active = await ReservationSvc.ListActiveAsync(CancellationToken.None);
+        _released = await ReservationSvc.ListReleasedAsync(CancellationToken.None);
+    }
+
+    private void OpenReleaseDialog(ExternalIdReservation r)
+    {
+        _releasing = r;
+        _reason = string.Empty;
+        _error = null;
+    }
+
+    private async Task ReleaseAsync()
+    {
+        if (_releasing is null || string.IsNullOrWhiteSpace(_reason)) { _error = "Reason is required"; return; }
+        _busy = true;
+        try
+        {
+            await ReservationSvc.ReleaseAsync(_releasing.Kind.ToString(), _releasing.Value, _reason, CancellationToken.None);
+            _releasing = null;
+            await ReloadAsync();
+        }
+        catch (Exception ex) { _error = ex.Message; }
+        finally { _busy = false; }
+    }
+}