Summary

• fix the missing loop-completion arc on Python 3.14 when a break exits the final loop iteration immediately before function return
• apply the same correction in both the C tracer and Python tracer
• add a focused regression covering the break case

Problem

Fixes #2168.

coverage report -m could show a missing branch after a break-driven loop exit on Python 3.14 even though the code path was executed.

Solution

Record the current line as the final arc before emitting the function-exit arc when returning from a loop-completion path.