AI Dev Tool: Bun Hono TypeSafe (n1j9)

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Preview Code

```python
# AI Dev Tool: FastAPI Pydantic v2 Micro-SaaS Boilerplate with PostgreSQL Vector Search Extension
# ==================================================================================================
from fastapi import FastAPI, Depends, HTTPException
from fastapi.security import OAuth2PasswordBearer, OAuth2PasswordRequestForm
from pydantic import BaseModel, EmailStr
from typing import Optional
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, Session
from sqlalchemy.pool import NullPool
from sqlalchemy.exc import SQLAlchemyError
from cloudflare import WorkersKV

# Define the FastAPI application
app = FastAPI()

# Define the OAuth2 scheme
oauth2_scheme = OAuth2PasswordBearer(tokenUrl="token")

# Define the database connection
DATABASE_URL = "postgresql://user:password@host:port/dbname"
engine = create_engine(DATABASE_URL, poolclass=NullPool)
# ... full runnable version includes tests & documentation