AI Dev Tool: Rust WebAssembly Edge Function

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Preview Code

```python
# AI Dev Tool: FastAPI Pydantic v2 Micro-SaaS Starter
# Description: Production-ready FastAPI starter boilerplate with Pydantic v2, 
#              PostgreSQL Vector Search Extension, and Next.js Expo Monorepo Boilerplate

from fastapi import FastAPI, Depends
from fastapi.responses import JSONResponse
from fastapi.requests import Request
from pydantic import BaseModel
from typing import Optional
from sqlalchemy import create_engine, Column, Integer, String
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
from sqlalchemy.exc import SQLAlchemyError
import psycopg2
import json

# Initialize FastAPI app
app = FastAPI()

# Define Pydantic models
class User(BaseModel):
    id: int
    name: str
    email: str
# ... full runnable version includes tests & documentation