# БД синхронная psycopg, HTTP синхронный requests
@app.get("/orders/{id}")
async def get_order(id: int):
    # ← async endpoint, но...
    order = psycopg_conn.execute("SELECT ... WHERE id=%s", (id,)).fetchone()
    shipping = requests.get(f"http://ship/{id}").json()
    return {"order": order, "shipping": shipping}

# asyncpg + httpx.AsyncClient (или aiohttp)
@app.get("/orders/{id}")
async def get_order(id: int, session: AsyncSession = Depends(get_session)):
    order = await session.scalar(select(Order).where(Order.id == id))
    async with httpx.AsyncClient() as client:
        shipping = (await client.get(f"http://ship/{id}")).json()
    return {"order": order, "shipping": shipping}