v0.1.15

Added

• dahrk status leads with a verdict line and lists the runtimes with versions, the stages in
  flight, and the hub's last welcome. (#60)
• dahrk status --json prints the same facts as JSON, withholding the enrolment token. (#60)
• dahrk stop and dahrk restart refuse to kill a stage in flight and list what is running;
  --force interrupts anyway. (#60)
• dahrk update offers to restart a running node, and prints the command instead where there is
  nobody to ask.

Fixed

• dahrk update points at dahrk restart to pick up the new version, and offers to run it. (#60)
• start and restart show the supervisor's output only when a step that mattered failed, hiding
  launchd's expected unload complaint. (#60)
• dahrk restart is one command reporting one outcome, and never records the node as deliberately
  stopped when the start half fails. (#60)
• dahrk status recognises a node started with --foreground, under pm2, or in a container, by
  reading the pidfile. (#60)
• dahrk doctor and dahrk run preflight fall back to wss://api.dahrk.ai when DAHRK_HUB_URL is
  unset. (#60)
• dahrk update hides the package manager's output unless the upgrade fails or you pass
  --verbose. (#60)
• Every command shares the same status symbols, layout, and hints, with colour switched off when
  piped, when NO_COLOR is set, or unsupported. (#60)