refactor: route agent llm settings through runtime

app/agent/tools/base.py

@@ -17,7 +17,9 @@ from app.agent.policy.sanitizer import (
 )
 from app.agent.tools.tags import ToolTag
 from app.chain import ChainBase
-from app.runtime.config import settings
+from app.runtime.settings import RuntimeSettingsCompat
+
+settings = RuntimeSettingsCompat()
 from app.application.messaging.agent import matches_channel_admin
 from app.runtime.extensions.service_config import ServiceConfigHelper
 from app.runtime.log import logger