feat: update to persistent config

backend/config.py

@@ -541,7 +541,9 @@ WEBHOOK_URL = PersistentConfig(
 
 ENABLE_ADMIN_EXPORT = os.environ.get("ENABLE_ADMIN_EXPORT", "True").lower() == "true"
 
-MODEL_CONFIG = CONFIG_DATA.get("models", {"ollama": [], "litellm": [], "openai": []})
+MODEL_CONFIG = PersistentConfig(
+    "CONFIG_DATA", "models", {"ollama": [], "litellm": [], "openai": []}
+)
 
 ####################################
 # WEBUI_SECRET_KEY