Bug: Duplicate logs when using application factory

[ulbwa]

Describe the bug
When running the code using an application factory, logs are duplicated. If you uncomment the block of code that does not use the factory, logs are written three times. It appears that multiple instances of CriticalLogMiddleware are being created, even though only one middleware is listed in broker._middlewares.

How to reproduce
Include source code:

from faststream import FastStream
from faststream.nats import JStream, NatsBroker, NatsRouter

router = NatsRouter()


@router.subscriber("logtest", stream=JStream("some"), queue="some-logtest")
async def testhandler(message: str): ...


# b = NatsBroker()
# b.include_router(router)
# a = FastStream(b)


# @a.after_startup
# async def _():
#     await b.publish("logtest", "logtest")


def get_app():
    b = NatsBroker()
    b.include_router(router)
    a = FastStream(b)

    @a.after_startup
    async def _():
        await b.publish("logtest", "logtest")

    return a