v0.3.1
[chat] use official transformers and fix some issues (#4117)
[NFC] policy applications/Chat/examples/ray/mmmt_prompt.py code style (#4250)
support session-based training (#4313)
[chat] fix bugs in stage 3 training (#3759)
[Coati] first commit (#3283)
[chat] refactor trainer class (#4080)
[NFC] polish applications/Chat/examples/train_reward_model.py code style (#4271)
[chat] update reward model sh (#3578)
[chat] typo accimulation_steps -> accumulation_steps (#3662)