feat: add P0 seed scripts for timetable, planned lessons, file cabinets, and curriculum
- seed_kevlarai_timetable.py: Mirror Greenfield timetable structure for KevlarAI
(8 classes, 2 teachers, 2 students, full slot/materialize/sync pipeline)
- seed_planned_lessons.py: 2-3 planned lessons per teacher across both schools
(6 plans total, idempotent via title+subject check)
- seed_file_cabinets.py: One file cabinet per class with sample documents
(14 cabinets, ~28 files, document_artefacts, cabinet_memberships)
- seed_curriculum.py: Exam board specifications and exams (AQA, Edexcel, OCR)
(6 specs, 12 exam papers, Neo4j curriculum topics per school)
Kevin Carter
ead4452277