Explicit annotations of Runtime can lead to problems with type inference

[suned]

Consider this:

from stateless import Runtime

r: Runtime[str | bytes] = Runtime().use('hello!')

According to mypy this is OK, since the right hand side value is inferred to be Runtime[str | bytes] due to the annotation. This in turn means that mypy also says that this is ok:

from stateless import Depend


e: Depend[bytes, float]
r.run(e)

But this in fact leads to a MissingDependencyError because r can't provide instances of byte.

Ideally, Runtime should be defined such that Runtime.use('hello!') can't be assigned to a variable of type Runtime[str | bytes] in the first place.