fix: #87 add activity to AzureServiceBusHealthCheck

src/extensions/azureServiceBus/Wemogy.CQRS.Extensions.AzureServiceBus/Health/AzureServiceBusHealthCheck.cs

@@ -30,6 +30,7 @@ public AzureServiceBusHealthCheck(string connectionString, string queueName)
 
         public async Task<HealthCheckResult> CheckHealthAsync(HealthCheckContext context, CancellationToken cancellationToken = default)
         {
+            using var activity = Observability.DefaultActivities.StartActivity();
             try
             {
                 var client = ClientConnections.GetOrAdd(_queueName, _ => new ServiceBusClient(_connectionString));