Dispatch to specific strconv formatters rather than %v for printing flag/arg types

[FollowTheProcess]

• No longer use '%v' formatting, dispatch to faster, more specific strconv formatters
• Use the strings.Builder unsafe trick

Summary

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.98%. Comparing base (cdb5dbf) to head (5974d35).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #215      +/-   ##
==========================================
+ Coverage   86.21%   86.98%   +0.76%     
==========================================
  Files           8        8              
  Lines        1480     1552      +72     
==========================================
+ Hits         1276     1350      +74     
+ Misses        149      148       -1     
+ Partials       55       54       -1     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.