## Code Review: PR #66
### Changes Reviewed
1. `app/models/ticket.rb`: Added auto-archive on cancel, unarchive on reopen
2. `db/migrate/20251228065038_auto_archive_existing_cancelled_tickets.rb`: Migration to archive existing cancelled tickets
3. `db/schema.rb`: Schema updates
### Quality Assessment: **PASS**
✅ **Well-tested**: Auto-archive callback has test coverage at `spec/models/ticket_spec.rb:489-497`
✅ **Model tests pass**: All 78 ticket/comment model tests passing
✅ **Cascade logic fix**: Improved to only archive done/cancelled subtasks, not active ones
✅ **Migration includes down migration**: Properly reversible
### Minor Note
The schema.rb diff shows many unrelated table deletions (solid_queue, solid_cable tables). These appear to be cleanup of unused ActiveJob/ActionCable tables and are not part of this ticket's changes.
The core fix for archived tickets appearing on kanban is complete and tested.