database.py

from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker, declarative_base

# Use SQLite for simplicity (you can switch to PostgreSQL/MySQL later)
DATABASE_URL = "sqlite:///./app.db"

engine = create_engine(
    DATABASE_URL, connect_args={"check_same_thread": False}
)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
Base = declarative_base()