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

from fastapi import FastAPI, HTTPException
from pydantic import BaseModel
from typing import List, Optional
import sqlite3
import json

# Define the FastAPI application
app = FastAPI(
    title="FastAPI Pydantic v2 Micro-SaaS Boilerplate",
    description="Production-ready starter boilerplate for building micro-SaaS applications",
    version="1.0.0"
)

# Define the Pydantic models
class User(BaseModel):
    """User model"""
    id: int
    name: str
    email: str

class Item(BaseModel):
    """Item model"""
    id: int
    name: str
    description: str
    price: float

# Define the database connection
class Database:
    """Database connection"""
    def __init__(self, db_name: str):
        self.conn = sqlite3.connect(db_name)
        self.cursor = self.conn.cursor()

def create_table(self):
        """Create table"""
        self.cursor.execute("""
            CREATE TABLE IF

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