fix(code-review): resolve Batch 1 open findings (AdminUI auth, AlarmHistorian dispose guards, docs)

- AdminUI-001: gate Script editor pages at Administrator,Designer + loosen ScriptAnalysis backend to match
- AdminUI-004: explicit [Authorize] on FleetStatus/Alert/ScriptLog hubs
- Core.AlarmHistorian-014: ObjectDisposedException guards on GetStatus/RetryDeadLettered (+ regression test)
- Core.Scripting.Abstractions-004/-007: Deadband tolerance doc + stale ScriptedAlarms.md path
- Host-003: correct config-overlay precedence in ServiceHosting.md
- Configuration-014: LdapGroupRoleMapping collation-dependency doc
- Driver.TwinCAT.Contracts-002: Structure enum doc (discovery-only sentinel)

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

@@ -2,7 +2,7 @@
 @page "/scripts/{ScriptId}"
 @* Script CRUD. SourceHash is computed automatically from SourceCode on save so the
    integrity check in v2's deployment pipeline doesn't require operator action. *@
-@attribute [Microsoft.AspNetCore.Authorization.Authorize]
+@attribute [Microsoft.AspNetCore.Authorization.Authorize(Roles = "Administrator,Designer")]
 @rendermode RenderMode.InteractiveServer
 @using Microsoft.AspNetCore.Components.Forms
 @using Microsoft.EntityFrameworkCore

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

@@ -1,5 +1,5 @@
 @page "/scripts"
-@attribute [Microsoft.AspNetCore.Authorization.Authorize]
+@attribute [Microsoft.AspNetCore.Authorization.Authorize(Roles = "Administrator,Designer")]
 @rendermode RenderMode.InteractiveServer
 @using Microsoft.EntityFrameworkCore
 @using ZB.MOM.WW.OtOpcUa.Configuration