Was sending 'consentimiento_turno' (plain text fallback) while the
configured template is 'consentimiento_turno_v2'. Now reads
turnero_wa_template and turnero_wa_lang from lab_config, matching
the same logic used in create_turno.php (kiosk).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>