I don't care much about pascelCase, but I wish we name "handler" explicitly. The repo module itself is already quite ambiguous by mixed with non-handler modules like appview/db.
So we can put the handler prefix to either repo module or each files. And for this case, as the commit message says we are splitting handlers into separate files, so putting prefix for individual files make sense.
I prefer prefix rather than suffix because it makes easier to spot non-prefixed files (like routers or util files) from file explorer.
