Add Book model

models/book.py

@@ -0,0 +1,41 @@
+Here's the SQLAlchemy model for the `Book` entity:
+
+```python
+from sqlalchemy import Column, String, Text, Integer, ForeignKey
+from sqlalchemy.orm import relationship
+from sqlalchemy.sql import func
+from app.api.db.base_class import Base
+import uuid
+
+class Book(Base):
+    __tablename__ = "books"
+
+    id = Column(String, primary_key=True, default=lambda: str(uuid.uuid4()))
+    title = Column(String, nullable=False, index=True)
+    description = Column(Text, nullable=True)
+    author = Column(String, nullable=False, index=True)
+    pages = Column(Integer, nullable=False)
+    
+    # Relationships
+    # Example: user_id = Column(String, ForeignKey("users.id"))
+    # Example: user = relationship("User", back_populates="books")
+
+    # Timestamps
+    created_at = Column(DateTime, default=func.now())
+    updated_at = Column(DateTime, default=func.now(), onupdate=func.now())
+```
+
+This model includes the following columns:
+
+- `id`: A UUID primary key column
+- `title`: A required string column for the book title, indexed for faster searches
+- `description`: An optional text column for the book description
+- `author`: A required string column for the author name, indexed for faster searches
+- `pages`: A required integer column for the number of pages
+
+Additionally, the model includes:
+
+- `created_at` and `updated_at` columns for tracking when the record was created and last updated
+- Placeholders for relationships to other models (e.g., `User`) if needed
+
+You can customize this model further by adding or modifying columns, constraints, and relationships based on your specific requirements.