fix status implementation

[dlopes7]

The Status implementation is all over the place, we have:

• Status
• IgnoreStatus - which is a standalone class that doesn't represent anything
• MultiStatus
• EndpointStatus
• EndpointStatuses

And keep checking for isinstance in several places, none of these classes seem to be related to one another, they don't inherit from the same class, they have completely different methods between themselves.

The query method is also broken in typecheck because we introduced a return IgnoreStatus for some reason but did not update the method signature

We need to clean this up, make a Status interface that the other ones implement, correctly type the methods that use it and also add documentation of how to use Status.