v0.1.4

Added

• dahrk update self-updates to the latest published client, detecting the install channel (npm,
  Homebrew, curl); --check reports availability only. (#18)
• dahrk run <workflow> runs a workflow locally against this node's worktree, starting with
  preflight, with no Linear, OAuth or issue. (#17)

Fixed

• A deliver whose run branch adds nothing over the base short-circuits to an explicit noop:
  nothing is pushed and no pull request opened. (#16)
• Edge policy decisions are enforced before Claude tool execution, and artifact paths that escape the
  run worktree are rejected. (#19)
• A stage that has already finished replays its cached result when the hub re-sends the frame. (#20)
• The heartbeat pings the hub connection and terminates the socket after three missed replies, so the
  node reconnects. (#20)