chore: bump minimum go version to 1.24 and modernize

[mccutchen]

The results of running

go run golang.org/x/tools/gopls/internal/analysis/modernize/cmd/modernize@latest -fix -test ./...

See modernize analyzer docs for more info.

[github-actions]

🔥 Run benchmarks comparing 271c21b against main:

gh workflow run bench.yaml -f pr_number=61

Note: this comment will update with each new commit.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.94%. Comparing base (7aee74c) to head (271c21b).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #61   +/-   ##
=======================================
  Coverage   92.94%   92.94%           
=======================================
  Files           2        2           
  Lines         496      496           
=======================================
  Hits          461      461           
  Misses         28       28           
  Partials        7        7           

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