0.8.4 — Stop phantom switch/alarm events on resubscribe and restart

• Fixed (#336): Universal Switch button presses (and motion / smoke-alarm
  events) could re-fire as phantom events when the SHC rotated its long-poll
  subscription (~every 24 h) and again on every Home Assistant restart. The
  controller re-delivers each service's current state on (re)subscribe; the
  device-trigger path (bosch_shc.event) for Universal Switches had no replay
  guard, so every switch's last keypress replayed at once — re-triggering
  device-trigger automations (e.g. "all lights turned on" with nobody home).
  The switch listener now tracks the last fired eventTimestamp, seeded from the
  device's current state at startup, and only fires when it advances. The motion
  and smoke / smoke-detection-system guards are now likewise seeded at startup
  so they no longer fire a stale snapshot once per restart. Genuine presses and
  real state changes still fire normally.