-- Cópia de referência. Execute a migration Prisma:
-- protik_server/prisma/migrations/20260722180000_restructure_schedule_items/migration.sql
--
-- Resumo: cria ptk_project_schedule_item, migra filhos, remapeia
-- ptk_project_schedule_user e ptk_schedule_ticket para item_id,
-- remove parent_id/level de ptk_project_schedule.