⚡ Live Sandbox: AI Dev Tool: Rust WebAssembly Edge Function

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```python
# AI Dev Tool: FastAPI Pydantic v2 Micro-SaaS with PostgreSQL Vector Search Extension
# Description: A production-ready starter boilerplate for building micro-SaaS applications
#               with FastAPI, Pydantic v2, and PostgreSQL Vector Search Extension.

from fastapi import FastAPI, Depends
from fastapi.responses import JSONResponse
from pydantic import BaseModel
from typing import List
from psycopg2 import connect
from psycopg2.extras import DictCursor
from sqlalchemy import create_engine, Column, Integer, String
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
import os
import logging

# Initialize the logger
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

# Initialize the FastAPI application
app = FastAPI()

# Define the PostgreSQL connection parameters
POSTGRES_HOST = os.environ.get('POSTGRES_HOST', 'localhost')
POSTGRES_PORT = os.environ.get('POSTGRES_PORT', 5432)
POSTGRES_USER = os.environ.get('POSTGRES_USER', 'postgres')
POSTGRES_PASSWORD = os.environ.get('POSTGRES_PASSWORD', 'postgres')
POSTGRES_DB = os.environ.get('POSTGRES_DB', 'postgres')

# Create a PostgreSQL connection

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