FI-2410: a little extra logging

[dehall]

Summary

Adds some extra logging to try to figure out why the validator flips to R5 on occasion. A line is added to the operations that could change the state of the validator: loading an IG, loading a profile, and validating a resource.
The goal of this is just to help identify which IGs or profiles may be causing the issue, then we can research those and see the contents separately. (In other words, I'm not logging the entire content of anything here. That would probably be unreadable)

Testing Guidance

Recommend using the UI to help test out the various actions. https://github.com/inferno-framework/fhir-validator-app and change public/config.js to point to this running instance

2 important questions:

1. Are there other interactions that we could add extra logging to?
2. Is it possible for some combinations to error out, for example null pointer exceptions?

[Jammjammjamm]

This seems like a good start.