[r4venrudy]

Description

--benchmark-resamples=0 currently parses successfully, even though the bootstrap analysis needs a nonempty set of resamples. Reject zero at the command-line boundary, mirroring the existing validation of --benchmark-samples.

Use parseUInt to validate the value before updating ConfigData, and report a specific error for malformed input. Add command-line regressions for zero and nonnumeric input, retain the existing positive-value test, document the constraint, and update the SelfTest approval baselines. No amalgamated files are changed.

Validation on Windows with Clang 23.1.3/libc++, C++14, and the basic-tests development preset:

• Before the fix, the new zero-value test fails because parsing succeeds; the malformed-value test fails because the parser returns the generic conversion error.
• After the fix, the command-line group passes all 263 assertions in 4 test cases.
• All 82 CTest entries pass, including approval tests after regenerating and reviewing the expected output with tools/scripts/approve.py.
• Linux, macOS, and sanitizer builds were not run locally.

GitHub Issues

No linked issue; this change is limited to command-line validation of the resample count.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.19%. Comparing base (0809213) to head (89e5cd5).

Additional details and impacted files

@@            Coverage Diff             @@
##            devel    #3218      +/-   ##
==========================================
+ Coverage   91.18%   91.19%   +0.01%     
==========================================
  Files         205      205              
  Lines        9101     9110       +9     
==========================================
+ Hits         8298     8307       +9     
  Misses        803      803              

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