Apply runic formatting

[kdw503]

Summary

• Applies runic formatting to src/ and test/
• Formatting-only commit; no functional changes

Test plan

• Tests pass before formatting
• CI passes

🤖 Generated with Claude Code

[codecov]

Codecov Report

❌ Patch coverage is 87.17949% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 87.02%. Comparing base (899d697) to head (77dc467).
⚠️ Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
src/RegisterMismatch.jl	87.17%	5 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #28   +/-   ##
=======================================
  Coverage   87.02%   87.02%           
=======================================
  Files           1        1           
  Lines         131      131           
=======================================
  Hits          114      114           
  Misses         17       17           

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