The supabase-js .functions.invoke() call from one edge function to
another doesn't reliably attach the apikey as Authorization, so the
inner send-transactional-email call was failing verify_jwt and
returning 401. Pass the service-role bearer header explicitly.
This is what was actually preventing bill-approval-vote-invite emails
from going out — every Notify Board flow logged 401s on the per-bill
sends, with zero rows ever landing in email_send_log for that template.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>