feat: implement dynamic class duration timer

fix(backend): handle NoneType exception for last_seen and upgrade absent status on late arrival

chore(backend): temporarily change outgoing attendance threshold to 5 minutes for testing

feat(backend): customize end session email for partially marked students

fix(backend): always broadcast marked status for existing attendance records to ensure ui ticks appear after refresh

feat: implement two-step attendance with incoming and outgoing logs

fix(backend): prevent attendance percentage from exceeding 100% when checking during an ongoing active class session

fix(backend): remove subject cleanup script from seed.py to prevent assigned subjects from deleting on deploy

fix(backend): catch RuntimeError on websocket send_json when connection closes

fix(backend): handle unique constraint errors on duplicate student/faculty creation

feat(backend): add reset semester attendance endpoint

fix(backend): import Subject in main.py to fix NameError during attendance marking

fix: resolve attendance calculation and 0 alerts for multiple daily sessions by using dynamic periods

fix: attendance calculations, false positive threshold, and session class increments

feat: add change password endpoint

feat: limit recent students and faculty to 3 in dashboard overview

fix: remove hardcoded mock values and use actual db counts and correct HOD seed

feat: reset clears all users except shyamala

fix: force update shyamala password during reset

fix: change hod password from '!' to '1'

feat: add shyamala hod during db reset

feat: add shyamala hod and clear attendance script update

fix: nameerror on student_message in finalize_daily_attendance

feat: bulk attendance alerts return target emails

fix: move email sending to frontend to bypass huggingface backend IP blocks from google

fix: add user-agent header to google script request to bypass 403

feat: use google apps script for email delivery to bypass SMTP firewall

fix: gracefully swallow SMTP errors in demo environments

fix: catch email exceptions and add SMTP timeout

feat: backend features for forgot password and custom alerts

feat: Add reset-data admin endpoint

fix: Include attendance records for subjects outside of student's default semester

fix: Wrap websocket loop in try-except and add missing models import

feat: enforce dynamic subjects seeding, track classes taken dynamically on start-camera, and fix admin subject initialization

fix: use naive UTC datetimes for database operations to resolve asyncpg offsets clash

fix: cast numpy types to python natives in faces_info for JSON serialization

feat: optimize streaming to JSON coordinates and implement direct backend attendance marking

fix: implement timezone-aware UTC datetime for correct attendance times

fix: import face_engine globally to resolve NameError in websocket handler

feat: implement client-side frame websocket streaming and dynamic YOLO conf

fix: pass options endpoint parameter for direct IPv4 Neon connections

feat: implement cross-semester faculty subjects and relaxed face registration checks

fix: resolve IPv6 dns timeouts and increase asyncpg timeout to 30s

fix: add bcrypt==3.2.2 to requirements.txt for passlib compatibility

fix: add python-dotenv to requirements.txt

fix: use working Hugging Face download URL for yolov8n-face.pt

fix: download yolov8n-face.pt on startup if missing

fix: convert requirements.txt to UTF-8 encoding

feat: add semester 5 subjects database seeding and search by email

Add pool_pre_ping and pool_recycle to database engine