⚡ Live Playground: AI Dev Tool: Rust WebAssembly Edge (ixgl)

```python
# AI Dev Tool: Edge Function API Gateway
# =======================================
# A production-ready Edge Function API Gateway using Hono Cloudflare Workers D1 Starter,
# FastAPI Pydantic v2 Micro-SaaS, and PostgreSQL Vector Search Extension.

import os
import json
from fastapi import FastAPI, HTTPException
from fastapi.responses import JSONResponse
from pydantic import BaseModel
from hono import Hono
from cloudflare import WorkersKV
from psycopg2 import connect
from psycopg2.extras import DictCursor

# Initialize FastAPI app
app = FastAPI()

# Initialize Hono client
hono = Hono(os.environ['HONO_PROJECT_ID'], os.environ['HONO_API_KEY'])

# Initialize Cloudflare Workers KV
kv = WorkersKV(os.environ['CLOUDFLARE_ACCOUNT_ID'], os.environ['CLOUDFLARE_API_TOKEN'])

# Initialize PostgreSQL connection
conn = connect(
    host=os.environ['POSTGRESQL_HOST'],
    database=os.environ['POSTGRESQL_DATABASE'],
    user=os.environ['POSTGRESQL_USER'],
    password=os.environ['POSTGRESQL_PASSWORD']
)
cur = conn.cursor(cursor_factory=DictCursor)

# Define API request model
class APIRequest(BaseModel):
    """API

⚡ Live Code Sandbox: AI Dev Tool: Rust WebAssembly Edge (ixgl)