v0.1.16

Added

• dahrk status states whether the client is up to date and how old that answer is, for example
  up to date (checked 3h ago). (#62)
• dahrk status --json reports currency as update: { kind, latest, checkedAt }, where kind is
  available, current, or unknown. (#62)

Changed

• The node checks for a new client every six hours rather than once a day, still jittered across a
  fleet. (#62)

Fixed

• A Pi stage on a credential-less node lands a resolved model on a provider the node can
  authenticate to. (#63)
• dahrk update records the latest published version it learned, and dahrk update --check
  refreshes a stale answer by hand. (#62)
• dahrk status distinguishes being on the latest version from never having checked. (#62)