⚡ Live Sandbox: AI Dev Tool: Nextjs Expo Monorepo (kstp)

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```python
# AI Dev Tool: Edge AI-Powered Vector Search API
# ==============================================
# This is a production-ready API integration wrapper for PostgreSQL Vector Search Extension
# using FastAPI, Pydantic, and Cloudflare Workers.

from fastapi import FastAPI, HTTPException
from pydantic import BaseModel
from typing import List, Optional
import psycopg2
import json
from cloudflare import WorkersKV

# Initialize the FastAPI app
app = FastAPI()

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

# Define the VectorSearchResponse model
class VectorSearchResponse(BaseModel):
    """Vector search response model."""
    results: List[dict]

# Initialize the PostgreSQL connection
def get_db_connection():
    """Get a PostgreSQL database connection."""
    try:
        conn = psycopg2.connect(
            host="your_host",
            database="your_database",
            user="your_user",
            password="your_password"
        )
        return conn
    except psycopg2.OperationalError as e:
        raise HTTPException(status_code=500, detail="Failed to connect to database") from e

# Initialize

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