Discovered while troubleshooting #2665.

At the moment, global file names aren't normalized before using them as a lookup key when using standard-json. This includes relative paths vs absolute paths and windows separator vs linux separator. I recommend normalizing the keys to absolute path, unix separator (since that works on Windows) before using it as a lookup key rather than using the key as-is. The current behavior can lead to a lot of wasted engineering time debugging as various layers of tooling may use different pathing techniques and the end-user likely expects the lookup to be normalized.