[saqibbedar]

📝 Description

• Added FastAPI's fourth practice project.
• Wrote safe code with exception handling.

🎯 Type of Change

• 🐛 Bug fix (non-breaking change fixing an issue)
• [ x ] ✨ New feature (non-breaking change adding functionality)
• 🧹 Refactoring / Code cleanup
• 📚 Documentation updates

🧪 How Has This Been Tested?

• [ x ] Manually tested edge cases (e.g., tested ZeroDivisionError messaging)
• [ x ] Automated tests pass (if applicable)

📋 Pre-Merge Checklist

• [ x ] My code follows the code style of this project
• [ x ] I have performed a self-review of my own code
• [ x ] I have commented on my code, particularly in hard-to-understand areas

[saqibbedar]

LGTM, all tests are passed and code quality is OSM. Ready to merge.