upcloud-api 0.1.5

The UpCloud API 1.3 surface the nordisk estates use, as ONE trait (`UpCloudApi`) with ONE wire implementation. Which cloud a run talks to (the account, or a mock-upcloud on loopback) is an `Endpoint` decided once at the edge, and a mock endpoint cannot be pointed off this machine. The fake that answers the trait in-process lives beside mock-upcloud's state machine.