Force FeaturesArray for Centurion devices regardless of reported protocol

Device.__init__ creates self.features as an empty dict ({}) when the
reported _protocol is <2.0, reserving FeaturesArray for HID++ 2.0.

The protocol floor in the protocol property only helps code paths that
access the property (e.g. feature_request's `if self.protocol >= 2.0`).
But __init__ reads the raw self._protocol attribute, so a wired G522
(reports 1.1) ends up with self.features = {}.

When solaar show later triggers `self.features._check()` inside
feature_request, the dict has no _check method → AttributeError →
crashes `solaar show` for the wired G522.

Fix: use FeaturesArray unconditionally when the device is Centurion.
The protocol version reported by these dongles is cosmetic — all
Centurion devices speak HID++ 2.0 features.

lib/logitech_receiver/device.py

@@ -222,7 +222,9 @@ class Device:
             self._protocol = self.descriptor.protocol if self.descriptor.protocol else None
             self.registers = self.descriptor.registers if self.descriptor.registers else []
 
-        if self._protocol is not None:
+        # Centurion devices always use HID++ 2.0 features regardless of the
+        # protocol version the dongle reports (e.g. G522 reports 1.1).
+        if self._protocol is not None and not self.centurion:
             self.features = {} if self._protocol < 2.0 else hidpp20.FeaturesArray(self)
         else:
             self.features = hidpp20.FeaturesArray(self)  # may be a 2.0 device; if not, it will fix itself later