Changes since langchain==0.2.7
docs: specify init_chat_model version (#24274)
langchain[patch]: Release 0.2.8 (#24273)
langchain[minor]: Generic configurable model (#23419)
langchain[minor]: add document_variable_name to create_stuff_documents_chain (#24083)
core[minor], integrations...[patch]: Support ToolCall as Tool input and ToolMessage as Tool output (#24038)
multiple: use modern installer in poetry (#23998)