- Add 37 missing models to backup (payment providers, polls, contests,
wheel, FAQ, promo offers, webhooks, configs, menu buttons, etc.)
- Add tariff_promo_groups and payment_method_promo_groups association tables
- Replace hardcoded association restore with generic handler
- Fix transaction atomicity: flush instead of commit in inner methods,
remove inner rollback calls, single commit/rollback in outer handler
- Fix composite PK support for UserPromoGroup (was only detecting first PK)
- Fix duplicate insert bug when clear_existing=True and record already exists
- Add cabinet_refresh_tokens to clear list, fix support_audit_logs deletion order
- Add Time column parsing for ReferralContest.daily_summary_time
- Security: tarfile filter='data', path traversal protection in _restore_files
and delete_backup, os.sep in startswith checks
02e40bd6f7