- seed-demo.ts now finds any existing school (from seed.ts) instead of creating a separate 'Demo Schule'
- This ensures demo accounts have access to the seeded data (classes, students, etc.)
- Falls back to creating a school if none exists
- Added schoolId field and school relation to ClassMessagingLock model
- Added escalationPoliciesOverridden to User model
- Added classMessagingLocksLocked to User model
- Added classMessagingLocks relation to ClassGroup model
- Added relation names to avoid ambiguity