fix(metadata): auto-disable archive_db setting when database file is missing

py/services/metadata_service.py

@@ -44,6 +44,8 @@ async def initialize_metadata_providers():
                 logger.debug(f"SQLite metadata provider registered with database: {db_path}")
             else:
                 logger.warning("Metadata archive database is enabled but database file not found")
+                logger.info("Automatically disabling enable_metadata_archive_db setting")
+                settings_manager.set('enable_metadata_archive_db', False)
         except Exception as e:
             logger.error(f"Failed to initialize SQLite metadata provider: {e}")
     

py/services/model_metadata_provider.py

@@ -676,10 +676,12 @@ class ModelMetadataProviderManager:
         
     def _get_provider(self, provider_name: str = None) -> ModelMetadataProvider:
         """Get provider by name or default provider"""
-        if provider_name and provider_name in self.providers:
+        if provider_name:
+            if provider_name not in self.providers:
+                raise ValueError(f"Provider '{provider_name}' is not registered")
             return self.providers[provider_name]
-        
+
         if self.default_provider is None:
             raise ValueError("No default provider set and no valid provider specified")
-            
+
         return self.providers[self.default_provider]