COMP: Remove conversion warnings after floor in RealTimeClock

[SimonRit]

This addresses the following two warnings:

C:\src\itk\ITK-main\Modules\Core\Common\src\itkRealTimeClock.cxx(113):
    warning C4244: '=': conversion from 'double' to 'SecondsCounterType', possible loss of data
C:\src\itk\ITK-main\Modules\Core\Common\src\itkRealTimeClock.cxx(114):
    warning C4244: '=': conversion from 'double' to 'MicroSecondsCounterType', possible loss of data

See main branch build with warnings and this PR build without warnings.

PR Checklist

• No API changes were made (or the changes have been approved)
• No major design changes were made (or the changes have been approved)
• Added test (or behavior not changed)
• Updated API documentation (or API not changed)
• Added license to new files (if any)
• Added Python wrapping to new files (if any) as described in ITK Software Guide Section 9.5
• Added ITK examples for all new major features (if any)

Refer to the ITK Software Guide for
further development details if necessary.

[greptile-apps]

Greptile Summary

This PR updates the Windows timestamp conversion in RealTimeClock. The main changes are:

• Replaces std::floor with typed itk::Math::Floor<T> calls.
• Removes MSVC narrowing conversion warnings for seconds and microseconds counters.
• Leaves the public API and non-Windows code path unchanged.

Confidence Score: 5/5

Safe to merge with minimal risk.

The change is small and localized, and it preserves the existing floor-and-convert behavior through ITK's typed math helper.

No files require special attention.

T-Rex Logs

What T-Rex did

• The narrow syntax check for the realtimeclock module was attempted but blocked by a missing itkConfigure.h.
• The pre-PR code path at lines 113-114 contained two direct std::floor assignments to counter types, as seen in the static-before log.
• The current checkout uses itk::Math::Floor<SecondsCounterType> and itk::Math::Floor<MicroSecondsCounterType> at lines 113-114, and the related assertions pass.
• Toolchain verification shows available local commands and confirms that CMake, Ninja, and MSVC are not on PATH.

_{Ran code and verified through T-Rex}

Important Files Changed

Filename	Overview
Modules/Core/Common/src/itkRealTimeClock.cxx	Updates the Windows RealTimeStamp conversion to use typed itk::Math::Floor calls without changing timestamp construction semantics.

_{Reviews (1): Last reviewed commit: "COMP: Remove conversion warnings after f..." | Re-trigger Greptile}