refactor: route agent llm settings through runtime

app/agent/llm/provider.py

@@ -20,7 +20,9 @@ import aiofiles
 import httpx
 import jwt
 
-from app.runtime.config import settings
+from app.runtime.settings import RuntimeSettingsCompat
+
+settings = RuntimeSettingsCompat()
 from app.application.configuration import get_configured_system_config as SystemConfigOper
 from app.runtime.log import logger
 from app.schemas.types import LlmProviderAction, SystemConfigKey