{
    "action": "final",
    "content": "The query over `raw.bedtime_screentime_sleep_debt` (8,500 rows) returned the distinct count for each categorical column:\n\n- **user_id**: 8,500 distinct values. It is unique per row, so it is an identifier and not a true category.\n- **primary_bedtime_app**: 6\n- **occupation_type**: 5\n- **sleep_debt_category**: 4\n- **gender**: 3\n- **chronotype**: 3\n- **blue_light_filter_active**: 2. It is stored as a BIGINT but behaves as a binary flag.\n\nAll the true categorical columns have low cardinality, from 2 to 6 values. That makes them easy to group by, and it matches the pre-aggregated gold tables, which are broken down by these same dimensions."
}