unify production app configuration and ML routes

app/config.py

@@ -8,6 +8,7 @@ from dataclasses import dataclass
 class Settings:
     ha_url: str | None = None
     ha_token: str | None = None
+    model_store: str = ".model_store"
 
     @property
     def ha_configured(self) -> bool:
@@ -18,4 +19,5 @@ def load_settings() -> Settings:
     return Settings(
         ha_url=os.getenv("SILLYHOME_HA_URL") or os.getenv("HA_URL"),
         ha_token=os.getenv("SILLYHOME_HA_TOKEN") or os.getenv("HA_TOKEN"),
+        model_store=os.getenv("SILLYHOME_MODEL_STORE", ".model_store"),
     )