feat(native-alarms): per-binding IsMesReportable on native alarm source bindings (ScadaBridge#59)

TemplateNativeAlarmSource.IsMesReportable + tri-state InstanceNativeAlarmSourceOverride
.IsMesReportableOverride flatten onto ResolvedNativeAlarmSource; NativeAlarmActor stamps every
mirrored condition and InstanceActor the quiet-binding placeholder, so ScriptAlarm,
Alarms.MesReportableAsync() and the #60 wire fields carry it. Additive to the 900-999 severity band.
Migration AddNativeAlarmSourceMesReportable. Management commands, CLI --mes-reportable, Central UI
(template dialog checkbox, instance override select), Transport DTOs/importer/diff and the revision
hash (true-only, so existing hashes are unchanged) carry it.

Claude-Session: https://claude.ai/code/session_01GT67AEHd2Acv1YPwGfXEoV

src/ZB.MOM.WW.ScadaBridge.TemplateEngine/Flattening/RevisionHashService.cs

@@ -109,6 +109,8 @@ public class RevisionHashService
                         ConditionFilter = n.ConditionFilter,
                         ConnectionName = n.ConnectionName,
                         IsLocked = n.IsLocked,
+                        // true-only (null when false) so existing revision hashes are unchanged.
+                        IsMesReportable = n.IsMesReportable ? true : null,
                         SourceReference = n.SourceReference
                     })
                     .ToList()
@@ -296,6 +298,11 @@ public class RevisionHashService
         /// </summary>
         public bool IsLocked { get; init; }
         /// <summary>
+        /// MES-reportable binding flag; null when false (the serializer drops nulls), so
+        /// pre-existing configurations hash identically.
+        /// </summary>
+        public bool? IsMesReportable { get; init; }
+        /// <summary>
         /// The source reference (OPC UA SourceNode/notifier nodeId, or MxAccess object/area).
         /// </summary>
         public string SourceReference { get; init; } = string.Empty;