The NPI/healthcare intake step persists provider email + name only into
intake_data (not the top-level state.email/state.name that the DOT/?dot=
flow sets). ReviewStep's order-create POST therefore sent empty
customer_email/customer_name -> API 400 'service_slug, customer_email, and
customer_name are required', blocking EVERY healthcare checkout at the
review step (explains 0 HC sales despite 13,425 sends).
ReviewStep now falls back to intake_data.{email,provider_name,
organization_name,legal_name,entity_name}; the Wizard cold-visitor create
path also now recognizes provider_name/organization_name. Verified the
trucking path is unaffected (it already populated top-level state).
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