Intern hash strings to reduce memory pressure. Improved logging

[dpp]

💻 Description of Change(s) (w/ context)

Intern strings for hashes and gitoids. This behavior was changed in a recent update and it turns out
that interning has a major benefit for collections of JARs that share a lot of classes.

Fixed logging in some cases where we actually expect failure (like trying to open an ISO that's not
really an ISO)

🧠 Rationale Behind Change(s)

Basic cleanup after the huge changes in the last PR

📝 Test Plan

Passes test

📜 Documentation

Added some ScalaDocs

💣 Quality Control

(All items must be checked before a PR is merged)
Did you…

• Mention an issue number in the PR title?
• Update the version # in the build file?
• Create new and/or update relevant existing tests?
• Create or update relevant documentation and/or diagrams?
• Comment your code?
• Fix any stray verbose logging (removing, or moving to debug / trace level)?

Before Merging…

• Make sure the Quality Control boxes are all ticked
• Make sure any open comments or conversations on the PR are resolved

[aredridel]

That makes sense. And since we never really want to free those in any meaningful way that'll work great