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```python
# AI Dev Tool: Edge Function SaaS Template
# Description: A production-ready Edge Function SaaS template using Cloudflare Workers, Hono, and PostgreSQL Vector Search Extension

import os
import json
from typing import Dict, List
from pydantic import BaseModel
from hono import Hono
from cloudflare import WorkersKV
from fastapi import FastAPI, HTTPException
from fastapi.responses import JSONResponse
from fastapi.requests import Request
from fastapi.middleware.cors import CORSMiddleware
from psycopg2 import connect
from psycopg2.extras import DictCursor

# Define the PostgreSQL database connection settings
POSTGRESQL_HOST = os.environ.get('POSTGRESQL_HOST')
POSTGRESQL_PORT = os.environ.get('POSTGRESQL_PORT')
POSTGRESQL_USER = os.environ.get('POSTGRESQL_USER')
POSTGRESQL_PASSWORD = os.environ.get('POSTGRESQL_PASSWORD')
POSTGRESQL_DB = os.environ.get('POSTGRESQL_DB')

# Define the Cloudflare Workers KV namespace
CLOUDFLARE_WORKERS_KV_NAMESPACE = os.environ.get('CLOUDFLARE_WORKERS_KV_NAMESPACE')

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

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