- Add backend/app/core/scheduler.py with AsyncIOScheduler, CronTrigger-based
job registration, and _fire_maintenance_schedule to create batch sessions
- Wire scheduler.start()/load_all_schedules()/shutdown() into main.py lifespan
- Call register_schedule() in create_schedule endpoint after commit
- Call register_schedule()/unregister_schedule() in update_schedule based on is_active
- Add TreeShare to models/__init__.py so all SQLAlchemy mapper relationships
resolve before ORM queries in the scheduler context
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
