"How to implement scheduled reminders + Google Calendar integration in Base44?"

Hi everyone, I’m building a system in Base44 that includes scheduled reminders to customers (via WhatsApp / SMS / Email), and I’d also like to connect it to Google Calendar to send reminders based on calendar events. Questions: 1️⃣ What is the best way to implement scheduled sending that works even when the system is not open (since it’s a web-based system)? 2️⃣ What is the best way to connect to an API for sending messages at scheduled times? 3️⃣ Is there an easy integration between Base44 and Google Calendar, or is it better to use Make / n8n? I’d really appreciate any tips or insights 🙏 Thanks a lot!