chore: attempt to integrate loco with apalis

[geofmureithi]

This PR attempts to combine apalis and loco for background processing.
The current attempt is for sqlite but it should be easy to apply it to other backends.

Open to a discussion.

[jondot]

Hi!
This looks interesting and may reduce the amount of custom code we have.
How would it look like if we expand to the other providers such as redis and postgres?
If we can keep the same abstraction in Loco, that could be an easy win

[geofmureithi]

How would it look like if we expand to the other providers such as redis and postgres?

They are all based on the same Storage trait, meaning it should be similar and straight forward.

[jondot]

yes this looks good
lets go for it 🚀

FYI we also built this: https://github.com/loco-rs/admin-jobs so feel free to take a look there as well