edf9e6bc93
- A group's last drift record outlived its registration (wc_product and user hot on dev36, any add-on deactivated): doctor counted it and could warn forever with a --fix hint that cannot reach it. Only records of backfillable groups are read; the router and clean_since already go by the registry. - Verify: DoctorTest (RED before); dev36 doctor user 9 → 8 groups - PR: PR-089a