Pydantic v1 support fixed; trace metadata renamed

Changes since langchain-core==1.4.6

chore: bump tornado from 6.5.5 to 6.5.6 in /libs/core (#38115) release(core): 1.4.7 (#38111) fix(core,partners): rename package version trace metadata (#38110) fix(core): fix Pydantic v1 support in tools/runnable (#33698) style(core,langchain,langchain-classic,partners): replace double backticks in docstrings (#38095)