feat(adminui): native-alarm HistorizeToAveva opt-out

src/Server/ZB.MOM.WW.OtOpcUa.OpcUaServer/Phase7Composer.cs

@@ -99,8 +99,13 @@ public sealed record EquipmentTagPlan(
 
 /// <summary>Native-alarm intent parsed from an equipment tag's <c>TagConfig.alarm</c> object. Null ⇒
 /// the tag is a plain value variable. <see cref="AlarmType"/> is an OPC UA Part 9 subtype string
-/// (OffNormalAlarm/DiscreteAlarm/LimitAlarm/AlarmCondition); <see cref="Severity"/> is the 1..1000 scale.</summary>
-public sealed record EquipmentTagAlarmInfo(string AlarmType, int Severity);
+/// (OffNormalAlarm/DiscreteAlarm/LimitAlarm/AlarmCondition); <see cref="Severity"/> is the 1..1000 scale.
+/// <see cref="HistorizeToAveva"/> is the per-condition opt-out of the durable AVEVA historian write
+/// (<c>bool?</c>; absent ⇒ <c>null</c> ⇒ historize). It is threaded onto each native
+/// <c>AlarmTransitionEvent</c> so the runtime's <c>HistorianAdapterActor</c> gate
+/// (<c>historizeToAveva is not false</c>) suppresses the durable row only on an explicit <c>false</c> —
+/// the same posture as the scripted-alarm opt-out; the live <c>/alerts</c> fan-out is unaffected.</summary>
+public sealed record EquipmentTagAlarmInfo(string AlarmType, int Severity, bool? HistorizeToAveva = null);
 
 /// <summary>
 ///     One Equipment-namespace VirtualTag from a <see cref="VirtualTag"/> row (joined to its
@@ -493,7 +498,13 @@ public static class Phase7Composer
                 ? (tEl.GetString() ?? "AlarmCondition") : "AlarmCondition";
             var sev = a.TryGetProperty("severity", out var sEl) && sEl.ValueKind == JsonValueKind.Number
                 && sEl.TryGetInt32(out var sv) ? sv : 500;
-            return new EquipmentTagAlarmInfo(type, sev);
+            // historizeToAveva (bool?, absent ⇒ null ⇒ historize): only an explicit false suppresses the
+            // durable AVEVA write at the HistorianAdapterActor gate; a non-bool node ⇒ null (default-on).
+            bool? historize = a.TryGetProperty("historizeToAveva", out var hEl)
+                    && hEl.ValueKind is JsonValueKind.True or JsonValueKind.False
+                ? hEl.GetBoolean()
+                : null;
+            return new EquipmentTagAlarmInfo(type, sev, historize);
         }
         catch (JsonException) { return null; }
     }