Issue

Fixes #13
Fixes #14

Description

• Sort different types of JSON artifacts into different directories, allowing the deserialization test to address just the artifacts it ought to
• Replace rustbuild.yml with the Rust starter workflow, which 1) restores PR triggering, 2) adds main branch triggering, 3) adds test running
• Rename GitHub Actions workflow "Linux Build Rust" -> "CI" (IMO simpler and yet more descriptive)

I suspect #14 was a regression introduced in f470d12, which added an Election JSON artifact to a directory that otherwise only contained Record artifacts.

Testing

CI!

Checklist

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• 🤔 CONSIDER adding a unit test if your PR resolves an issue.
• ✅ DO check open PR's to avoid duplicates.
• ✅ DO keep pull requests small so they can be easily reviewed.
• ✅ DO build locally before pushing.
• ✅ DO make sure tests pass.
• ✅ DO make sure any new changes are documented.
• ✅ DO make sure not to introduce any compiler warnings.
• ❌AVOID breaking the continuous integration build.
• ❌AVOID making significant changes to the overall architecture.

💔Thank you!