⚡ Live Sandbox: AI Dev Tool: Hono Cloudflare Workers D1

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```python
# AI Dev Tool: Edge AI-Powered Vector Search API
# =============================================
# This is a production-ready Edge AI-Powered Vector Search API boilerplate
# utilizing Cloudflare Workers, Hono, and PostgreSQL Vector Search Extension.

import os
import json
from pydantic import BaseModel
from hono import Hono
from cloudflare import Worker
from psycopg2 import connect
from psycopg2.extras import DictCursor

# Define the VectorSearchRequest model
class VectorSearchRequest(BaseModel):
    """Vector search request model"""
    query: str
    limit: int = 10

# Define the VectorSearchResponse model
class VectorSearchResponse(BaseModel):
    """Vector search response model"""
    results: list

# Initialize the Hono app
app = Hono()

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

# Define the vector search function
def vector_search(query: str, limit: int = 10):
    """
    Perform vector search on the PostgreSQL database.

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