Changes since langchain-core==0.2.26
core[patch]: Release 0.2.27 (#24952)
core[patch]: Fix tool args schema inherited field parsing (#24936)
core: docstrings BaseCallbackHandler update (#24948) core[patch]: runnable config ensure_config deep copy from var_child_runnable… (#24862) core[patch]: In unit tests, use _schema()` instead of BaseModel.schema() (#24930)
core[patch]: stringify tool non-content blocks (#24626)
core[minor]: Add support for pydantic 2 to utility to get fields (#24899)