Validate Enrich Phone Numbers in Google Sheets with RapidAPI

# 📋 Phone Number Validation with Google Sheets 

## 🧩 **Use Case**
Automatically validate phone numbers from a Google Sheet using RapidAPI and update the results back to the same sheet.

## ✅ **Benefits**
- Automates phone validation  
- Enriches data with location, country, timezone  
- Reduces manual effort  
- Handles batch processing  
- Continues on errors  

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## 🧱 **Node-by-Node Explanation**

- **🔘 When clicking ‘Execute workflow’** – Manually triggers the workflow.  
- **📄 Google Sheets** – Reads phone numbers from a Google Sheet.  
- **🔁 Loop Over Items** – Iterates over each row/phone number.  
- **🌐 HTTP Request** – Sends phone number to RapidAPI for validation.  
- **📥 Google Sheets1** – Updates the sheet with validation results (is_valid, country, location, timezone).