Add sensor freshness checks

custom_components/heating_mpc/const.py

@@ -10,6 +10,8 @@ CONF_MIN_ON = "minimum_on_minutes"
 CONF_MIN_OFF = "minimum_off_minutes"
 CONF_SWITCH_COST = "switching_cost"
 CONF_HEAT_COST = "heating_cost"
+CONF_ROOM_MAX_AGE = "room_max_age_minutes"
+CONF_WEATHER_MAX_AGE = "weather_max_age_minutes"
 CONF_BAND = "comfort_band"
 
 # Each source list is ordered: first valid sensor wins; remaining are fallbacks.
@@ -28,6 +30,8 @@ WEATHER_MAIN = ("temperature", "wind", "clouds")
 WEATHER_EXTRA = ("humidity", "feels_like", "pressure", "visibility", "rain", "snow")
 
 DEFAULTS = {
+    CONF_ROOM_MAX_AGE: 30,
+    CONF_WEATHER_MAX_AGE: 120,
     CONF_HORIZON: 120,
     CONF_MIN_ON: 15,
     CONF_MIN_OFF: 10,