fix: correct entity field syntax in README code example

[ElizioMartins]

Problem

The CRUD code example in README.md uses Id and String as class attributes without parentheses:

@Entity()
class Person:
    id = Id      # ❌ wrong
    name = String  # ❌ wrong

When a user copies this code and tries to instantiate Person(name="Joe Green"), they get a TypeError at runtime because Id and String are descriptor classes that must be instantiated (called with ()) to work correctly as field definitions.

This was originally reported in issue #10 back in 2021 and has been confirmed by multiple users since then.

Fix

Added the missing parentheses to both field definitions:

@Entity()
class Person:
    id = Id()       # ✅ correct
    name = String() # ✅ correct

This matches the syntax used throughout the actual example code in the repository.

Fixes #10

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About the contributor: I'm a developer passionate about open source and always looking for opportunities to contribute and grow. If you're looking for collaborators or have open positions, feel free to reach out!

• 🔗 LinkedIn: https://www.linkedin.com/in/elizio-martins/
• 📧 E-mail: elizio.matins@gmail.com