Remove obsolete test and utility scripts:
- backend/create_test_user.py
- backend/mark_migration_done.py
- backend/fix_alembic_version.py
- backend/RUN_TESTS.md (outdated test documentation)
Archive completed pdf-layout-restoration proposal:
- Moved from openspec/changes/pdf-layout-restoration/
- To openspec/changes/archive/2025-11-24-pdf-layout-restoration/
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
