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```python
# AI Dev Tool: FastAPI Pydantic v2 Micro-SaaS Boilerplate
# Description: A production-ready starter boilerplate for building micro-SaaS applications using FastAPI and Pydantic v2

from fastapi import FastAPI, Depends, HTTPException
from pydantic import BaseModel, Field
from typing import List, Optional
from sqlalchemy import create_engine, Column, Integer, String
from sqlalchemy.orm import sessionmaker, Session
from sqlalchemy.ext.declarative import declarative_base

# Initialize the FastAPI application
app = FastAPI()

# Define the database connection
SQLALCHEMY_DATABASE_URL = "sqlite:///example.db"
engine = create_engine(SQLALCHEMY_DATABASE_URL)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

# Define the base class for models
Base = declarative_base()

# Define a sample model
class Item(Base):
    __tablename__ = "items"
    id = Column(Integer, primary_key=True)
    title = Column(String, index=True)
    description = Column(String, index=True)

# Create the database tables
Base.metadata.create_all(bind=engine)

# Define a Pydantic model for the item
class ItemModel(BaseModel):
    id

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