Motivation

• Prevent an off-by-one / buffer sizing risk in Windows UTF-8-to-wide conversion when using MultiByteToWideChar(); make the multithread example use a standards-compliant main signature; and make the stress test portable on systems missing the timeout utility.

Description

• In src/operators/inspect_file.cc allocate needed wide characters, call MultiByteToWideChar() with capacity needed, verify the returned written count matches needed, and remove the trailing null via pop_back() to preserve previous behavior while fixing the sizing risk.
• In examples/multithread/multithread.cc change the program entry signature from int main(int argc, const char *argv[]) to int main(int argc, char *argv[]) without changing how arguments are used.
• In test/stress/inspectfile_multithread_stress.sh keep using timeout exactly as before when available, and otherwise print a clear warning and run the same command without timeout.

Testing

• Ran git diff --check which completed with no issues detected.
• Performed a shell syntax check sh -n test/stress/inspectfile_multithread_stress.sh which succeeded.

Codex Task