Security and robustness fixes

Full Changelog: 1.081...1.090

Add some documentation

Full Changelog: 1.080...1.081

Shutter movement fix

Full Changelog: 1.070...1.080

State restore after a restart

• State restore after a restart for shutters (last estimated position) and
  DALI/DMX lights (on/off, brightness, RGB color), via RestoreEntity. No more
  shutter stuck at "unknown" or DMX/RGB light coming back off after a restart or an
  update of Home Assistant. The restore is accurate here since only Home Assistant
  drives these outputs (the PLC's internal program is suspended).
• Toggle option "Restore state after restart" in the integration settings
  (Configure), enabled by default. Relays and on/off lights are not affected: they
  keep re-reading their real state from the PLC at startup.

Fix Entities Types

Fixed

• Air-conditioning registers, pumps, solenoid valves and contactors showed up as
  lights. In the Calaos file these outputs have gui_type="light" but a separate
  io_style attribute (heater, pump, boiler, outlet) that the importer
  ignored. It now honors it: those outputs are created as switch entities
  (with the outlet device class for outlet, and a fitting icon for
  radiator/pump/boiler), while genuine lights stay as light.

Migration note

• After the update, the affected entities change domain (light.* → switch.*):
  their entity_id changes and the old light.* entities become orphaned. Update
  your dashboards and automations, and remove the light.* entities that became
  unavailable.

DALI Light Fix

DALI lights switching back to "off" ~1-2 min after being turned on. The DALI
state was polled periodically via WAGO_DALI_GET, but that read returns "off"
(the query is unreliable, and impossible for DMX at address >= 100), which
overwrote the real state. In line with Calaos, DALI state is no longer polled in a
loop: it is read once at startup (and only for genuine DALI addresses 1-64),
then tracked optimistically. Since the PLC's internal program is suspended, a
DALI light can only be changed from Home Assistant, so the optimistic state is
exact.

DALI lights switching Fix

• DALI lights switching back to "off" ~1-2 min after being turned on. The DALI
  state was polled periodically via WAGO_DALI_GET, but that read returns "off"
  (the query is unreliable, and impossible for DMX at address >= 100), which
  overwrote the real state. In line with Calaos, DALI state is no longer polled in a
  loop: it is read once at startup (and only for genuine DALI addresses 1-64),
  then tracked optimistically. Since the PLC's internal program is suspended, a
  DALI light can only be changed from Home Assistant, so the optimistic state is
  exact.

Unstable inputs fix

• Unstable inputs: clicks were lost intermittently (issue #2). The UDP listener
  socket (port 4646) was opened with SO_REUSEPORT; on Linux the kernel then
  spreads incoming datagrams across every socket bound to that port. After a reload,
  an update or a restart, an old socket sometimes stayed bound and "stole" a share
  of the WAGO INT packets, which were silently lost. The socket is now
  exclusive: every input packet reaches the single listening instance.
• Clean close of the UDP socket on unload (waiting for its actual release) and a
  bind retry at startup, so a reload never leaves two sockets competing for the port.

Added

• A bus event wago2haddon_event is fired on every decoded action (single /
  double / triple click, long press), in addition to the event entity. An event
  trigger on this event is fully reliable (never de-duplicated) and is a robust
  alternative for automations.
• Defensive handling of multiple messages per datagram (no message dropped if the
  PLC were to batch them).
• Clean cancellation of the input decoder timers when an entity is removed (avoids
  an event firing after a reload).