Issue #698 nb device active for boiler not updating (#728)

* With tests and list of active

* Issue #698 - nb nb_device_active_for_boiler don't work for climate without hvac_action

---------

Co-authored-by: Jean-Marc Collin <jean-marc.collin-extern@renault.com>

custom_components/versatile_thermostat/base_thermostat.py

@@ -131,7 +131,7 @@ class BaseThermostat(ClimateEntity, RestoreEntity, Generic[T]):
                     "max_power_sensor_entity_id",
                     "temperature_unit",
                     "is_device_active",
-                    "nb_device_actives",
+                    "device_actives",
                     "target_temperature_step",
                     "is_used_by_central_boiler",
                     "temperature_slope",
@@ -1001,14 +1001,19 @@ class BaseThermostat(ClimateEntity, RestoreEntity, Generic[T]):
         return False
 
     @property
-    def nb_device_actives(self) -> int:
-        """Calculate the number of active devices"""
-        ret = 0
+    def device_actives(self) -> int:
+        """Calculate the active devices"""
+        ret = []
         for under in self._underlyings:
             if under.is_device_active:
-                ret += 1
+                ret.append(under.entity_id)
         return ret
 
+    @property
+    def nb_device_actives(self) -> int:
+        """Calculate the number of active devices"""
+        return len(self.device_actives)
+
     @property
     def current_temperature(self) -> float | None:
         """Return the sensor temperature."""
@@ -2680,6 +2685,7 @@ class BaseThermostat(ClimateEntity, RestoreEntity, Generic[T]):
             "timezone": str(self._current_tz),
             "temperature_unit": self.temperature_unit,
             "is_device_active": self.is_device_active,
+            "device_actives": self.device_actives,
             "nb_device_actives": self.nb_device_actives,
             "ema_temp": self._ema_temp,
             "is_used_by_central_boiler": self.is_used_by_central_boiler,