{
    "action": "final",
    "content": "**No duplicates were found.** The check over `raw.bedtime_screentime_sleep_debt` returned:\n\n- Total rows: 8,500\n- Distinct `user_id` values: 8,500, so every row has a unique key and the grain of one row per user holds.\n- Distinct full profiles: 8,500, so no two rows share the same combination of attributes.\n- Duplicate groups: 0, and rows in duplicate groups: 0.\n\nThis check covers exact duplicates, both on the key and on the full profile. It does not test for fuzzy near-duplicates, such as rows that match on most columns but differ slightly in one measure like `sleep_latency_min`. I did not run that test, so I can't say whether any exist. Nothing in the evidence suggests repeated records, though."
}