Where can I change the maximum number of file attachments from 5

Considering the Team project is supposed to be open source, I have to believe that there i a place where I can make this change. I am hosting my own server on-prem. I would really appreciate it if someone could point me to where this limitation is implemented both in the server and mobile app if applicable.

Unfortunately this would be a deal breaker for me. I really only need to increase it to about 15. The total amount of files in size would still fall under 50MB, although I believe that is easily configured.

Any thoughts or suggestions are greatly appreciated.