Connection closes if save method was triggered in pytest.

Describe the bug
Whenever I'm testing my API built with Litestar and Tortoise ORM, the connection closes if there's an interac

To Reproduce

    async def test_verify_email(client, test_user: User):
        otp = "111111"
    
        # Verify that the email verification fails with an invalid otp
        response = await client.post(
            f"{BASE_URL_PATH}/verify-email", json={"email": test_user.email, "otp": otp}
        )
        assert response.status_code == 404
        assert response.json() == {
            "status": "failure",
            "code": ErrorCode.INCORRECT_OTP,
            "message": "Incorrect Otp",
        }
        # Verify that the email verification succeeds with a valid otp
        otp = await Otp.create(user_id=test_user.id)
    
        response = await client.post(
            f"{BASE_URL_PATH}/verify-email",
            json={"email": test_user.email, "otp": otp.code},
        )
        assert response.status_code == 200
        assert response.json() == {
            "status": "success",
            "message": "Account verification successful",
        }

The test_user is a fixture that creates a test user. But once it does the test fails with connection closed error at this line:

response = await client.post(
    f"{BASE_URL_PATH}/verify-email", json={"email": test_user.email, "otp": otp}
)

If the client and test_user parameter are interchanged like this: test_user: User, client, test still fails with the same error but in this line: Otp.create(user_id=test_user.id). So whichever goes first, it closes the connection unexpectedly.

Here's my db config:

MODELS = [
    "app.db.models.base",
    "app.db.models.general",
    "app.db.models.accounts",
]

TORTOISE_ORM = {
    "connections": {"default": settings.TORTOISE_DATABASE_URL},
    "apps": {
        "models": {
            "models": MODELS
            + [
                "aerich.models",
            ],
            "default_connection": "default",
        },
    },
}


@asynccontextmanager
async def lifespan(app: Litestar):
    await Tortoise.init(config=TORTOISE_ORM)
    yield
    await connections.close_all()

Start with the pytest reproduction and the Litestar lifespan shown in the issue, especially Tortoise.init(config=TORTOISE_ORM) and connections.close_all(). Trace which fixture or request causes the connection to close, then verify the reproduction no longer fails at client.post or Otp.create and that lifecycle cleanup still occurs.