fix: actually report metrics to influxdb in scheduled tasks runner

PluralKit.ScheduledTasks/TaskHandler.cs

@@ -96,6 +96,9 @@ public class TaskHandler
 
         // Other shiz
         _metrics.Measure.Gauge.SetValue(Metrics.WebhookCacheSize, stats.Sum(x => x.WebhookCacheSize));
+
+        await Task.WhenAll(((IMetricsRoot)_metrics).ReportRunner.RunAllAsync());
+        _logger.Debug("Submitted metrics to backend");
     }
 
     private async Task CleanupOldMessages()