Track exceptions for namespace statistics

This tracks exceptions for updating namespace statistics in Sentry
instead of logs.

app/workers/namespaces/root_statistics_worker.rb

@@ -16,13 +16,7 @@ module Namespaces
 
       namespace.aggregation_schedule.destroy
     rescue ::Namespaces::StatisticsRefresherService::RefresherError, ActiveRecord::RecordNotFound => ex
-      log_error(namespace.full_path, ex.message) if namespace
-    end
-
-    private
-
-    def log_error(namespace_path, error_message)
-      Gitlab::SidekiqLogger.error("Namespace statistics can't be updated for #{namespace_path}: #{error_message}")
+      Gitlab::ErrorTracking.track_exception(ex, namespace_id: namespace_id, namespace: namespace&.full_path)
     end
   end
 end

app/workers/namespaces/schedule_aggregation_worker.rb

@@ -16,8 +16,8 @@ module Namespaces
       return if root_ancestor.aggregation_scheduled?
 
       Namespace::AggregationSchedule.safe_find_or_create_by!(namespace_id: root_ancestor.id)
-    rescue ActiveRecord::RecordNotFound
-      log_error(namespace_id)
+    rescue ActiveRecord::RecordNotFound => ex
+      Gitlab::ErrorTracking.track_exception(ex, namespace_id: namespace_id)
     end
 
     private
@@ -34,9 +34,5 @@ module Namespaces
 
       Namespace::AggregationSchedule.table_exists?
     end
-
-    def log_error(root_ancestor_id)
-      Gitlab::SidekiqLogger.error("Namespace can't be scheduled for aggregation: #{root_ancestor_id} does not exist")
-    end
   end
 end

spec/workers/namespaces/root_statistics_worker_spec.rb

@@ -42,7 +42,7 @@ describe Namespaces::RootStatisticsWorker, '#perform' do
         allow_any_instance_of(Namespace::AggregationSchedule)
           .to receive(:schedule_root_storage_statistics).and_return(nil)
 
-        expect(Gitlab::SidekiqLogger).to receive(:error).once
+        expect(Gitlab::ErrorTracking).to receive(:track_exception).once
 
         worker.perform(group.id)
       end

spec/workers/namespaces/schedule_aggregation_worker_spec.rb

@@ -48,7 +48,7 @@ describe Namespaces::ScheduleAggregationWorker, '#perform', :clean_gitlab_redis_
 
   context 'when namespace does not exist' do
     it 'logs the error' do
-      expect(Gitlab::SidekiqLogger).to receive(:error).once
+      expect(Gitlab::ErrorTracking).to receive(:track_exception).once
 
       worker.perform(12345)
     end