Enhancement: after_startup and after_shutdown hook

[m3nowak]

Summary

Issue #2375 mentions, that after_startup and after_shutdown hooks have been removed. However, it is a feature, which I need.
Right now, I'm developing a service for receiving web hooks. After application start, I need to inform remote service, that my server started accepting requests.

Basic Example

app = Litestar(
    [index],
    after_startup=[lambda: print("Application started up!")]
)

Drawbacks and Impact

No response

Unresolved questions

My current workaround is running desired function after asyncio.sleep together with ASGI server in asyncio.gather. Is there a better alternative?

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[Alc-Alc]

Will lifespan work for your use case?

[provinzkraut]

See discussions in #3598 and #3597.

Closing as duplicate.

@Alc-Alc is correct, using lifespan is the way to go here.