⚡ Live Sandbox: AI Dev Tool: FastAPI Pydantic v2 (38du)

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```python
# AI Dev Tool: Cloudflare Worker Hono API Template
# ==============================================
# A production-ready starter boilerplate for building scalable and secure APIs
# using Cloudflare Workers, Hono, and PostgreSQL.

import os
import json
from typing import Dict, List
from pydantic import BaseModel
from hono import Hono
from cloudflare import Worker

# Define the PostgreSQL database connection settings
POSTGRES_HOST = os.environ.get('POSTGRES_HOST')
POSTGRES_PORT = os.environ.get('POSTGRES_PORT')
POSTGRES_USER = os.environ.get('POSTGRES_USER')
POSTGRES_PASSWORD = os.environ.get('POSTGRES_PASSWORD')
POSTGRES_DB = os.environ.get('POSTGRES_DB')

# Define the Hono API settings
HONO_API_KEY = os.environ.get('HONO_API_KEY')
HONO_API_SECRET = os.environ.get('HONO_API_SECRET')

# Define the Cloudflare Worker settings
CLOUDFLARE_ACCOUNT_ID = os.environ.get('CLOUDFLARE_ACCOUNT_ID')
CLOUDFLARE_API_TOKEN = os.environ.get('CLOUDFLARE_API_TOKEN')

# Define the PostgreSQL Vector Search Extension settings
POSTGRES_VECTOR_SEARCH_EXTENSION = os.environ.get('POSTGRES_VECTOR_SEARCH_EXTENSION')

# Define the Pyd

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