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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.requests import Request
from fastapi.middleware.cors import CORSMiddleware

# Initialize the FastAPI application
app = FastAPI(title="FastAPI Pydantic v2 Micro-SaaS Boilerplate", description="A production-ready starter boilerplate for building micro-SaaS applications.")

# Enable CORS middleware
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],
    allow_credentials=True,
    allow_methods=["*"],
    allow_headers=["*"],
)

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

# Define a Pydantic model for the product
class Product(BaseModel):
    """Product model."""
    id: int
    name: str
    price: float

# Define a route for getting all

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