style(adminui): btn-groups + prose trim on top-level ops pages

Group related action buttons into btn-group/btn-group-sm on Alerts, Certificates,
ApiKeys and ScriptEdit; promote the RoleGrants Delete from btn-link to
btn-outline-danger. Replace the two inline style="border-color:var(--alert)"
no-ops with the .notice-alert class, and the undefined --surface-2 token in
Scripts with the theme's shipped --zebra-bg.

Delete unconditional documentation prose now covered by docs/ (Redundancy,
Telemetry, AlarmTracking, security, Reservations, AlarmHistorian, ScriptEditor),
keeping state banners and live captions. Correct the LDAP config key on
RoleGrants to Security:Ldap:GroupToRole (LdapOptions.SectionName) and drop the
same wrong key from Account with its deleted block; reword the stale
"Engine emit (F8/F9) is pending" script-log empty state.

src/Server/ZB.MOM.WW.OtOpcUa.AdminUI/Components/Pages/AlarmsHistorian.razor

@@ -15,13 +15,7 @@
     <h4 class="mb-0">Alarms historian sink</h4>
 </div>
 
-<section class="panel notice rise" style="animation-delay:.02s">
-    Snapshot from the local node's <span class="mono">HistorianAdapterActor</span>. Default sink
-    is a no-op (<span class="mono">NullAlarmHistorianSink</span>); production wires
-    <span class="mono">LocalDbStoreAndForwardSink</span> — buffering into this node's LocalDb, and
-    draining to the HistorianGateway (<span class="mono">SendEvent</span>) only while this node holds
-    the Primary role. Polling every @PollSeconds s.
-</section>
+<div class="text-muted small mb-3">Polling every @PollSeconds s.</div>
 
 @if (_status is null)
 {