- Add role column to users table with admin/user constraint
- Add added_by_admin_id column to ebooks table for tracking
- Add constraint to ensure only admins can manage folders
- Update all SQL queries to include role field
- Regenerate database models with new schema
- Replace migration files with single schema.sql
- Include all current functionality in one file
- Add 10-point rating scale with half-star precision
- Remove old migration complexity for development
- Maintain all table constraints and indexes
- Add proper comments for rating system
- Prepare clean schema for first release deployment