Apply runic formatting

[kdw503]

Summary

• Format src/ and test/ with runic
• Wrap test cases in a named @testset "RegisterDriver" block

Test plan

• CI passes on this PR

🤖 Generated with Claude Code

[codecov]

Codecov Report

❌ Patch coverage is 60.00000% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 74.31%. Comparing base (89abd3e) to head (6fccd3a).

Files with missing lines	Patch %	Lines
src/RegisterDriver.jl	60.00%	8 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #24   +/-   ##
=======================================
  Coverage   74.31%   74.31%           
=======================================
  Files           1        1           
  Lines         109      109           
=======================================
  Hits           81       81           
  Misses         28       28           

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