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```python # AI Dev Tool: FastAPI Pydantic v2 Micro-SaaS PostgreSQL Vector Search Extension # Description: A production-ready FastAPI boilerplate with PostgreSQL vector search extension # Author: Elite Software Architect and Micro-SaaS Developer from fastapi import FastAPI, HTTPException from pydantic import BaseModel from typing import List, Optional from sqlalchemy import create_engine, Column, Integer, String from sqlalchemy.ext.declarative import declarative_base from sqlalchemy.orm import sessionmaker from sqlalchemy.exc import SQLAlchemyError import psycopg2 import logging # Initialize the logger logging.basicConfig(level=logging.INFO) logger = logging.getLogger(__name__) # Define the FastAPI app app = FastAPI() # Define the PostgreSQL database connection POSTGRES_USER = "your_username" POSTGRES_PASSWORD = "your_password" POSTGRES_HOST = "your_host" POSTGRES_PORT = "your_port" POSTGRES_DB = "your_database" # Create a PostgreSQL database engine engine = create_engine(f"postgresql://{POSTGRES_USER}:{POSTGRES_PASSWORD}@{POSTGRES_HOST}:{POSTGRES_PORT}/{POSTGRES_DB}") # Create a configured "Session" class Session = sessionmaker(bind=engine) # Create a base class for declar
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