[OMON-491] Data Sampling: add Data Sampling tag to Monitoring metrics (#7264)

Author: knopers8

Utilities/DataSampling/src/Dispatcher.cxx

@@ -21,7 +21,6 @@
 #include "Framework/DataSpecUtils.h"
 #include "Framework/Logger.h"
 #include "Framework/ConfigParamRegistry.h"
-#include "Framework/InputRecordWalker.h"
 #include "Framework/Monitoring.h"
 #include "Framework/DataRefUtils.h"
 
@@ -45,7 +44,6 @@ Dispatcher::~Dispatcher() = default;
 void Dispatcher::init(InitContext& ctx)
 {
   LOG(DEBUG) << "Reading Data Sampling Policies...";
-
   boost::property_tree::ptree policiesTree;
 
   if (mReconfigurationSource.empty() == false) {
@@ -137,8 +135,8 @@ void Dispatcher::reportStats(Monitoring& monitoring) const
     dispatcherTotalAcceptedMessages += policy->getTotalAcceptedMessages();
   }
 
-  monitoring.send({dispatcherTotalEvaluatedMessages, "Dispatcher_messages_evaluated"});
-  monitoring.send({dispatcherTotalAcceptedMessages, "Dispatcher_messages_passed"});
+  monitoring.send(Metric{dispatcherTotalEvaluatedMessages, "Dispatcher_messages_evaluated"}.addTag(tags::Key::Subsystem, tags::Value::DataSampling));
+  monitoring.send(Metric{dispatcherTotalAcceptedMessages, "Dispatcher_messages_passed"}.addTag(tags::Key::Subsystem, tags::Value::DataSampling));
 }
 
 DataSamplingHeader Dispatcher::prepareDataSamplingHeader(const DataSamplingPolicy& policy)