feat(streaming): carry IsMesReportable on AlarmStateUpdate (25) and DebugAlarmStateDto (20) (ScadaBridge#60)

Central's Debug View live stream and Alarm Summary cache always saw false
because neither wire message had the field. Additive proto fields, vendored
C# regenerated with docker/regen-proto.sh (sitestream + sitecommand), mapped
both ways in StreamRelayActor/SiteStreamGrpcClient and SiteCommandDtoMapper.
The live stream publishes Alarm Actor events, which never carried the flag,
so InstanceActor.HandleAlarmStateChanged now stamps it before retaining and
publishing. A pre-#60 site sends the proto3 default. No UI badge yet.

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

src/ZB.MOM.WW.ScadaBridge.Communication/Grpc/SiteCommandDtoMapper.cs

@@ -1941,7 +1941,8 @@ public static class SiteCommandDtoMapper
             CurrentValue = alarm.CurrentValue,
             LimitValue = alarm.LimitValue,
             NativeSourceCanonicalName = alarm.NativeSourceCanonicalName,
-            IsConfiguredPlaceholder = alarm.IsConfiguredPlaceholder
+            IsConfiguredPlaceholder = alarm.IsConfiguredPlaceholder,
+            IsMesReportable = alarm.IsMesReportable
         };
 
         if (alarm.Condition != AlarmConditionStateFactory.ForComputed(alarm.State, alarm.Priority))
@@ -1983,7 +1984,8 @@ public static class SiteCommandDtoMapper
             CurrentValue = dto.CurrentValue,
             LimitValue = dto.LimitValue,
             NativeSourceCanonicalName = dto.NativeSourceCanonicalName,
-            IsConfiguredPlaceholder = dto.IsConfiguredPlaceholder
+            IsConfiguredPlaceholder = dto.IsConfiguredPlaceholder,
+            IsMesReportable = dto.IsMesReportable
         };
 
         return dto.Condition is null ? alarm : alarm with { Condition = FromProto(dto.Condition) };