fix

app/storage/mongo/collections/tasks.go

@@ -33,6 +33,14 @@ type InsertedTask struct {
 	Attempts         int        `bson:"attempts"`
 }
 
+func Count() (*int64, error) {
+	count, err := collection().CountDocuments(context.TODO(), bson.M{})
+	if err != nil {
+		return nil, err
+	}
+	return &count, nil
+}
+
 func Add(task InsertedTask) error {
 	_, err := collection().InsertOne(context.TODO(), task)
 	if err != nil {