fix(adminui): lane D-b review r0 fixes (I1, M1, M2, M5-M9, N1-N3, N5, H3)

I1: /hosts eviction keyed off the AUTHORED DriverInstances, so a driver
deleted in /raw but not yet deployed - still running, still publishing -
vanished every tick. The stores' sweep is now EvictUnconfiguredStale(set,
olderThanUtc): an entry goes only when unconfigured AND its PublishedUtc is
older than 60 s. Tests cover unconfigured+fresh kept (positive control),
unconfigured+stale evicted, configured+stale kept, and the deploy hand-off.

M1: Test Connect falls back to the driver's documented ProbeTimeoutSeconds
default (Galaxy 30, OpcUaClient 15, ...) when the key is absent.
M2: the budget never undercuts the config's root timeoutMs (+1 s).
M5: RawBrowseModal compares the open generation captured before the await,
so a close-then-reopen mid-open closes the stale session.
M6: /alarms-historian keeps a 30 s re-poll on 'not registered' (a driver
node may still be starting) instead of stopping for good.
M7: /scripts source fetch failure shows in the dialog, not the error boundary.
M8: the export modal maps only its preview rows; the endpoint writes via
Results.Text (no second byte[] copy).
M9: /hosts config queries are ordered, so SequenceEqual change detection holds.
N1 tooltip, N2 CRLF-safe regex, N3 throttled Warning for subscriber faults,
N5 equipment-import help text now describes RFC 4180 quoting.
H3: MonacoEditor documents that themes are page-global.

Refs #745
Claude-Session: https://claude.ai/code/session_01Ub9hGmYLQvn9XETzw7CMsT

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Shared/Drivers/DriverTestConnectButton.razor

@@ -5,7 +5,7 @@
 
 <div class="d-inline-flex align-items-center gap-2">
     <button type="button" class="btn btn-outline-primary btn-sm" disabled="@_busy" @onclick="OnClickAsync"
-            title="@($"Probe budget: {_lastBudgetSeconds?.ToString() ?? "the driver's configured probe timeout"} s")">
+            title="@(_lastBudgetSeconds is { } b ? $"Probe budget: {b} s" : "Probe budget: the driver's configured probe timeout")">
         @if (_busy) { <span class="spinner-border spinner-border-sm me-1"></span> }
         Test Connect
     </button>
@@ -36,7 +36,7 @@
 
     /// <summary>
     ///     Fallback probe budget, used only when the config JSON carries no positive
-    ///     <c>ProbeTimeoutSeconds</c>. The configured value wins (it is every driver's documented "Test Connect
+    ///     <c>ProbeTimeoutSeconds</c> and the driver has no documented default (<c>TestConnectBudget.DriverDefaults</c>). The configured value wins (it is every driver's documented "Test Connect
     ///     probe timeout"), so it can lengthen the budget as well as shorten it. Clamped to [1, 60] s.
     /// </summary>
     [Parameter] public int TimeoutSeconds { get; set; } = TestConnectBudget.DefaultSeconds;
@@ -62,7 +62,7 @@
         try
         {
             var json = GetConfigJson() ?? "{}";
-            var budget = TestConnectBudget.Resolve(json, TimeoutSeconds);
+            var budget = TestConnectBudget.Resolve(json, TimeoutSeconds, DriverType);
             _lastBudgetSeconds = budget;
             _result = await Probe.TestAsync(DriverType, json, budget);
         }