025: Tabela whatsapp_config com access_token, phone_number_id,
api_version e webhook_token (singleton via UNIQUE INDEX on TRUE)
026: waba_id na whatsapp_config; colunas HSM em whatsapp_templates:
language, meta_template_name, meta_template_id, meta_status,
header_type, header_text, footer_text, buttons (JSONB),
body_variables (JSONB)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
