Refactor `llm_benchmark.py` to improve modularity and performance by
extracting request logic into a private function and preparing for
concurrent execution.
Update weekly schedule HTML templates in `point_system` to reflect
corrected presenter counts and adjust student list entries.
Add `timezone` to imports in `point_system/students/views.py` and replace
`datetime.now()` with `timezone.now()` to ensure consistent time handling
and prevent issues with naive datetime objects during attendance
recording.
add llm_benchmark.py
