⚡ Live Sandbox: AI Dev Tool: PostgreSQL Vector Search (ltm9)

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```python
# AI Dev Tool: Hono Cloudflare Workers D1 Starter with FastAPI and Pydantic v2
# A production-ready, micro-SaaS developer code asset for building scalable APIs

from fastapi import FastAPI, HTTPException
from pydantic import BaseModel
from typing import List, Optional
import cloudflare
import hono

# Initialize the FastAPI application
app = FastAPI()

# Define a Pydantic model for the API request body
class RequestBody(BaseModel):
    """Request body model"""
    id: int
    name: str
    description: Optional[str]

# Define a Pydantic model for the API response
class Response(BaseModel):
    """Response model"""
    id: int
    name: str
    description: Optional[str]

# Define a Cloudflare Worker using Hono
worker = cloudflare.Worker(
    script=f"""
    addEventListener('fetch', (event) => {
        event.respondWith(handleRequest(event.request))
    })

async function handleRequest(request) {
        const { searchParams } = new URL(request.url)
        const id = searchParams.get('id')
        const response = await fetch('https://example.com/api/endpoint', {
            method

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