feat(exams): cc.public.exams Neo4j graph init + node schemas

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- modules/database/schemas/nodes/exams/exam_nodes.py: neontology node classes for
  ExamBoard/Specification/SpecPoint/ExamPaper/Question/Part/Region (uuid_string joins
  to Supabase exam_questions.id / exam_response_areas.id / eb_exams.exam_code).
- run/initialization/init_exam_graph.py: idempotent init — creates the shared public
  cc.public.exams database, 10 uniqueness constraints, and seeds AQA + AQA-PHYS-8463
  (GCSE Physics) with its 8 top-level topic SpecPoints.

Applied + verified on dev Neo4j (192.168.0.209, enterprise): db online, 10 constraints,
AQA-[:PUBLISHES]->AQA-PHYS-8463-[:HAS_SPEC_POINT]->8 points. Full sub-point catalogue is
a later data task. spec_code AQA-PHYS-8463 must match the eb_exams seed (S4-3).

Co-Authored-By: Claude Opus 4.8 <[email protected]>

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CC Worker

2026-06-06 16:14:56 +00:00

co-authored by Claude Opus 4.8

parent 4b296cff74

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modules/database/schemas/nodes/exams/__init__.py