In The first On-Premises Api Model, They place the database in the intermediate layer. Is that database owned by Meta or by the company that has the bot?. In the intermediate layer, what do WhatsApp On-Premise Containers contain? What does WhatsApp Business/BSP's servers use for? What does the Business/BSP´s core servers contain compared to the Business/BSP's servers? In the WhatsApp Cloud API model, in which layers are the interpreter server and the database server placed?

Thank you.