🧠 How it works:
1️⃣ Triggers when a Google Calendar session ends.
2️⃣ Extracts the client’s name from the event title.
3️⃣ Fetches client info from Google Sheets.
4️⃣ Subtracts one from the remaining sessions count.
5️⃣ Updates the sheet automatically, no manual input needed.
6️⃣ Finds the next scheduled session from the calendar.
7️⃣ Sends an automated message via Bird API (WhatsApp) to the client confirming their next session.