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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, HTTPException
from pydantic import BaseModel
from typing import List, Optional
from fastapi.responses import JSONResponse
from fastapi.encoders import jsonable_encoder

# Initialize the FastAPI application
app = FastAPI()

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

# Define a Pydantic model for the item
class Item(BaseModel):
    """Item model"""
    id: int
    name: str
    description: str
    price: float

# Define a route to get all users
@app.get("/users", response_model=List[User])
async def get_users():
    """Get all users"""
    # Replace this with a database query
    users = [
        User(id=1, name="John Doe", email="john@example.com"),
        User(id=2, name="Jane Doe", email="jane@example.com

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