add metric name for mi-updates-transformer

Author: Vlasis-Perdikidis

lambdas/mi-updates-transformer/src/mi-updates-transformer.ts

@@ -71,6 +71,7 @@ function emitMetrics(logger: pino.Logger, eventTypeCount: Map<string, number>) {
           },
         ],
       },
+      "events published": count,
     };
     logger.info(emf);
   }