langchain-core 1.7.1

Changes since langchain-core==1.7.0

release(core): version 1.7.1 (#41548) fix(core): preserve gateway tracing metadata in v3 streams (#41504) fix(core): escape node metadata in Mermaid labels (#41512) chore(deps): bump the minor-and-patch group across 3 directories with 32 updates (#41465) chore(deps-dev): bump setuptools from 83.0.0 to 84.1.0 in /libs/core (#41442) chore(deps): bump nbconvert from 7.17.1 to 7.17.2 in /libs/core (#41425) chore(infra): relax third-party dependency upper bounds (#41407)