Paperclip CTO cfa9ad6f53 feat(TRA-236,TRA-238): M2 course domain model and dwell-time tracking ...

TRA-236 — Course domain model:
- courses/models.py: Course → Module → Lesson → Page hierarchy with UUID
  PKs, ordering fields, required_seconds navigation gate, version tracking,
  and UniqueConstraint per (parent, order) pair
- courses/migrations/0001_initial.py: initial migration (applies cleanly on
  a fresh DB)
- tests/test_course_domain.py: migration smoke, relation integrity, cascade
  delete, ordering, and uniqueness-constraint tests

TRA-238 — Dwell-time tracking:
- tracking/models.py: Enrollment, PageProgress (can_advance property), and
  DwellEvent models appended alongside existing AuditEvent
- tracking/services.py: record_dwell_event, compute_eligible_seconds (pure),
  check_navigation_gate, _recompute_accumulated — reconnect merging within
  RECONNECT_TOLERANCE_SECONDS and anti-idle cap at MAX_VALID_EVENT_SECONDS
- tracking/migrations/0001_initial.py: updated to include all four models
  (AuditEvent, Enrollment, PageProgress, DwellEvent) with FK dependencies
  on courses.Course and courses.Page
- tests/test_dwell_tracking.py: event replay, reconnect tolerance, anti-idle
  cap, gate pass/block, and can_advance DB integration tests

Co-Authored-By: Paperclip <noreply@paperclip.ing>

2026-05-07 09:11:23 +02:00

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