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.Commons/Entities/Templates/TemplateNativeAlarmSource.cs

@@ -23,6 +23,13 @@ public class TemplateNativeAlarmSource
     public string SourceReference { get; set; } = string.Empty;
     /// <summary>Optional condition filter; null = mirror all conditions under the source.</summary>
     public string? ConditionFilter { get; set; }
+    /// <summary>
+    /// When true, every condition mirrored under this binding is MES-reportable
+    /// (<c>AlarmStateChanged.IsMesReportable</c> / <c>ScriptAlarm.IsMesReportable</c>). Additive to the
+    /// 900-999 severity-band convention, which still flags a condition on its own. Default false.
+    /// Overridable per instance via <c>InstanceNativeAlarmSourceOverride.IsMesReportableOverride</c>.
+    /// </summary>
+    public bool IsMesReportable { get; set; }
     /// <summary>When true, this binding cannot be overridden in derived templates.</summary>
     public bool IsLocked { get; set; }
     /// <summary>True when copied from a base template and not yet overridden on the derived template.</summary>