Looks cool and useful. One note:

"ROAPI is made up of 4K lines of Rust. This line count is low due to the intense use of 3rd party libraries."

This actually seems like a high line count, and that's not counting all the 3rd party libraries.

While not sexy, this is the sort of thing that PHP can do fairly easily in a much smaller # of lines of code and operate with lower resource requirements. I venture that this could be done using CSV parse, json decode, and other built-in PHP functions and use small infrastructure to make it work. I know PHP doesn't have a lot of love, but isn't this the sort of thing PHP is made for? Simple processing and hosting for API-based access to static file information? Is there a reason why Rust is needed with all the baggage?