Option to require all changed files be evaluated by a rule

[robstolarz]

Hi folks, is there a way to / would y'all consider an option to require all changed files be evaluated by at least one rule? We think something like this would make for a great forcing function to encourage all teams to own the files they're changing, and it would help if the tool that ensured review policy is met for every PR could also help us determine a definitive owner or set of owners for every file.

We could probably make this work with some sort of post-processing but that might require reimplementing some of Policy Bot elsewhere, which we'd rather not do.