WEST COAST PEST - OPTION B - STEP 6

Purpose
- Fix clock-in insert so it only writes columns that actually exist in the live shared database.
- Remove hard dependency on optional work_sessions columns like auto_closed.

Overwrite
- /public_html/pest/api/clock-in.php

Test
1. Hard refresh /pest/attendance/
2. Login
3. Tap Clock In
4. Send screenshot after tap
