Changes since langchain-core==1.6.0
revert: release(core): 1.6.2 (#39971)
release(core): 1.6.2 (#39967)
fix(core): shore up indexing in genai v1 streaming content (#39964)
fix(core): make StructuredTool JSON-serializable (#39631)
chore(deps): bump minor and patch dependencies (#39869)
release(core): 1.6.1 (#39832)
feat(core): propagate gateway information on error path (#39829)