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/Core/ZB.MOM.WW.OtOpcUa.Configuration/Services/ILdapGroupRoleMappingService.cs

@@ -20,7 +20,11 @@ public interface ILdapGroupRoleMappingService
     /// <summary>List every mapping whose LDAP group matches one of <paramref name="ldapGroups"/>.</summary>
     /// <remarks>
     ///     Hot path — fires on every sign-in. The default EF implementation relies on the
-    ///     <c>IX_LdapGroupRoleMapping_Group</c> index. Case-insensitive per LDAP conventions.
+    ///     <c>IX_LdapGroupRoleMapping_Group</c> index. The match is a SQL <c>IN (…)</c> whose
+    ///     case-sensitivity is determined by the <c>LdapGroup</c> column collation. Case-insensitive
+    ///     behaviour requires a case-insensitive (CI) server or column collation — this is a
+    ///     deployment requirement. On a case-sensitive-collation server the lookup will silently
+    ///     miss rows that differ only in case.
     /// </remarks>
     /// <param name="ldapGroups">The LDAP groups to search for.</param>
     /// <param name="cancellationToken">The cancellation token.</param>

src/Core/ZB.MOM.WW.OtOpcUa.Core.AlarmHistorian/SqliteStoreAndForwardSink.cs

@@ -520,6 +520,7 @@ public sealed class SqliteStoreAndForwardSink : IAlarmHistorianSink, IDisposable
     /// <summary>Gets the current status of the historian sink including queue depth and drain state.</summary>
     public HistorianSinkStatus GetStatus()
     {
+        if (_disposed) throw new ObjectDisposedException(nameof(SqliteStoreAndForwardSink));
         // Core.AlarmHistorian-008: read the non-dead-lettered count from the in-memory
         // counter so a busy Admin UI / health probe does not hammer the DB. Dead-letter
         // depth is rare-path only (it lives in the queue until retention) so a real
@@ -563,6 +564,7 @@ public sealed class SqliteStoreAndForwardSink : IAlarmHistorianSink, IDisposable
     /// <summary>Operator action from Admin UI — retry every dead-lettered row. Non-cascading: they rejoin the regular queue + get a fresh backoff.</summary>
     public int RetryDeadLettered()
     {
+        if (_disposed) throw new ObjectDisposedException(nameof(SqliteStoreAndForwardSink));
         using var conn = OpenConnection();
         using var cmd = conn.CreateCommand();
         cmd.CommandText = "UPDATE Queue SET DeadLettered = 0, AttemptCount = 0, LastError = NULL WHERE DeadLettered = 1";

src/Core/ZB.MOM.WW.OtOpcUa.Core.Scripting.Abstractions/ScriptContext.cs

@@ -87,7 +87,8 @@ public abstract class ScriptContext
     /// </summary>
     /// <param name="current">The current value to check.</param>
     /// <param name="previous">The previous value to compare against.</param>
-    /// <param name="tolerance">The minimum difference threshold for a change to be detected.</param>
+    /// <param name="tolerance">The minimum change magnitude to detect (must be &gt;= 0).
+    ///     Negative values cause the function to always return true; NaN always returns false.</param>
     public static bool Deadband(double current, double previous, double tolerance)
         => Math.Abs(current - previous) > tolerance;
 }