Allow ability to regex filename for S3 uploads

Currently, you are limited to 1 consistent file name for uploading files on a schedule. This presents a problem for backfilling historical data due to size limitations, along with ongoing uploads of daily data. Best practice would be to allow regex so you can keep the beginning of your filename the same along with _reporting_date.csv.  

Hello Connor,

I take your request into cognisance and would like to assure you that we do have this in the roadmap. There are some super urgent tasks we are finishing as part of this quarter due to which we had shifted this particular requirement into the next quarter. As soon as we have more details as to when this functionality will be delivered, I will reply again. Thanks for sharing your suggestion, highly appreciated.