Web error log showed unpairAccountAction failing with the same FK
violation as group-sync: deleting whatsapp_groups rows that had been
used in reminders blew up reminder_targets_group_id_whatsapp_groups_id_fk
and aborted the unpair.
Switch to UPDATE … SET is_archived=true. The bot's group-sync upsert
already flips is_archived back to false on a re-pair (added in the
group-sync companion fix in the previous commit), so behaviour is
end-to-end equivalent to the old delete + repopulate path without
the FK fragility.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
yiekheng
d731390c9d