Reset neighbours' cross-ventilation when a window's polarity flips

A flipped contact sensor reverses what every term saw as open, including the
other zones' cross-ventilation term, whose fingerprint covered only the
window's sensor and opening factor.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

custom_components/heating_mpc/compatibility.py

@@ -15,7 +15,7 @@ everything else is kept. What each fingerprint covers:
 * ventilation terms: the measurement plus the zone's windows (sensor, polarity,
   opening factor); "vent_wind_dir" also the windows' facing directions;
   "recovery" also the recovery time constant; "vent_cross" also the other zones'
-  windows.
+  windows (sensor, polarity, opening factor).
 
 Comfort weight, target offset and names are not physical and are never included.
 """
@@ -71,7 +71,7 @@ def zone_fingerprints(zones: Mapping[str, Any], sources: Iterable[Any], windows:
         m = measured[key]
         plain = zone_windows(key)
         # Cross-ventilation scales with the other zones' openings.
-        others = sorted([w.sensor, w.opening] for w in windows if w.zone != key and w.enabled)
+        others = sorted([w.sensor, w.inverted, w.opening] for w in windows if w.zone != key and w.enabled)
         prints = {"base": m, "loss": m, "heat": m, "bias": m,
                   "internal": _hash([m, sorted(source_signature(s, sources) for s in sources
                                                 if s.zone == key and s.enabled)]),