Changes since langchain==0.3.25
langchain: release 0.3.26 (#31695)
openai[patch]: add Responses API attributes to BaseChatOpenAI (#30329)
langchain: Fix error in LLMListwiseRerank when Document list is empty (#31300)
langchain: add missing milvus branch for self_query (#31630)
core and langchain: Remove upper bound restriction langsmith dependency (#31629)
bump langsmith to allow 0.4 (#31594)
langchain[patch]: Allow specifying other hashing functions in embeddings (#31561)
langchain[patch]: Remove proxy imports to langchain_experimental (#31541)
core[patch]: revert change to stream type hint (#31501)
core: Add mypy strict-equality rule (#31286)
standard-tests: add benchmarks (#31302)
anthropic: support for code execution, MCP connector, files API features (#31340)
langchain[patch]: update AgentType docstring with correct documentation URL (#31333)
Fix link to deprecation alternative for ConversationChain in docs (#31299)
langchain: use mypy strict checking with exemptions (#31018)