v0.6.0 — Alert binary sensors, walldisplay cards, iPhone push, mDNS deploy fix

v0.6.0 — Alert binary sensors, walldisplay cards, iPhone push, mDNS deploy fix

Added

• Four derived alert binary sensors that pre-compute the
  conditions users actually want to react to:
  • binary_sensor.rain_warner_rain_imminent — dry now, rain in ≤ 30 min
  • binary_sensor.rain_warner_severe_weather — heavy / violent rain or hail likelihood
  • binary_sensor.rain_warner_winter_weather — snow / sleet / freezing rain
  • binary_sensor.rain_warner_extended_dry_spell — ≥ 7 days dry with no rain in the 6 h forecast
• automations/rain-warner-push.yaml — reference iOS push
  automations for rain_imminent and severe_weather. Both use
  interruption-level: time-sensitive, share a rain-warner tag
  group so iOS stacks notifications, and are gated to 07:00–22:00
  local time so nothing wakes you up at night.
• dashboard/notification-cards.yaml — four conditional markdown
  cards (🌧️ rain coming / ⛈️ severe / ❄️ winter / 🌵 dry spell) that
  drop into any walldisplay notification stack. Each card stays
  invisible until its alert flag flips on.
• New alerts.py module with the pure-stdlib flag logic, separated
  from the coordinator so it's unit-testable without HA imports.

Fixed

• deploy.sh --restart no longer falsely reports a recovery timeout
  on macOS hosts with flaky mDNS. The script now resolves the HA
  hostname to an IP once at startup and uses that for every
  subsequent probe, dashboard push and cache-bust.