Update app/model_status.py

correction bug initialisation

app/model_status.py

@@ -35,6 +35,9 @@ async def monitor_models_async(model_registry):
         temp_alive = []
         temp_dead = []
         for name, info in model_registry.items():
+            
+            if name not in failure_count:
+                failure_count[name] = 0
             # Skip complètement les modèles inactifs
             if model_registry[name]["status"] == "inactive":
                 continue