release ver0.4.0

Author: pancacake

CONTRIBUTING.md

@@ -1,6 +1,6 @@
 # Contributing to DeepTutor
 
-Thank you for your interest in contributing to DeepTutor! We are trying to make DeepTutor smooth and robust, for every developers to develop and conribute. 
+Thank you for your interest in contributing to DeepTutor! We are trying to make DeepTutor smooth and robust, for every developers to develop and conribute.
 
 Join our community for discussion and support:
 

scripts/diagnose_rag_pipelines.py

@@ -31,8 +31,8 @@
 from src.agents.question import AgentCoordinator
 from src.agents.solve import MainSolver
 from src.api.utils.history import ActivityType, history_manager
-from src.services.llm import get_llm_config
 from src.logging import get_logger
+from src.services.llm import get_llm_config
 
 # Initialize logger for CLI
 logger = get_logger("CLI", console_output=True, file_output=True)