v0.3.0

Added

• Backhaul connection type in the topology graph. Each node now reports how
  it reaches the mesh — over a wired ethernet uplink or the wireless mesh —
  derived from a configured uplink interface under /sys/class/net
  (carrier/operstate). The value rides on the node's self vertex, is
  preserved by the controller-side aggregator when that node is merged into the
  mesh-wide graph, and surfaces as a backhaul field on a topology node; the
  Topology view marks wired nodes with a solid border and wireless with a dashed
  one. Set the uplink interface with MESHD_BACKHAUL_IFACE (UCI backhaul_iface);
  empty => unknown. New internal/topology/backhaul.go.
• Status LED reflecting onboarding state. meshd now drives a node's status
  LED from its onboarding state so an installer can read it off the device
  without a companion app: blinking while unclaimed, a heartbeat while it joins,
  solid once a home is active. The LED is the kernel sysfs LED named by
  MESHD_LED_NAME (UCI led_name, default green:status); a board lacking that
  LED is a graceful no-op, so the same build runs unchanged across hardware. Set
  MESHD_LED=0 (UCI led_enabled '0') to leave the LED alone. New
  internal/deviceled package.
• Wired auto-onboard. An unclaimed node that is on the wire (ethernet
  backhaul) can now enroll into a discovered controller unattended, with no setup
  wizard: when it is still unclaimed, its ethernet uplink is up, and a controller
  other than its own Home has been discovered, it joins (the lowest discovered
  home_id, chosen deterministically), applies the returned profile, marks setup
  complete and tears down the first-boot setup AP. Opt-in via
  MESHD_AUTO_ONBOARD_WIRED (UCI auto_onboard_wired, default off); requires
  MESHD_BACKHAUL_IFACE to be set, runs only when no explicit MESHD_JOIN
  controllers are configured, and completes unattended only when the controller
  auto-adopts. New internal/onboard package.