fix(deps): update dependency @langchain/core to v1.1.40

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
@langchain/core (source)	1.1.39 → 1.1.40

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Release Notes

langchain-ai/langchainjs (@​langchain/core)

v1.1.40

Compare Source

Patch Changes

• #​10694 d3e0809 Thanks @​hntrl! - refactor(core): decouple tracer-only metadata defaults from runnable metadata
  • Add tracer-scoped inheritable metadata/tag options in callback manager while keeping backward-compatible aliases.
  • Move configurable-to-tracing metadata derivation into a tracer-only path and keep ensureConfig metadata mirroring limited to model.
  • Update LangChainTracer default metadata/tag handling and add regression tests for stream events metadata behavior.

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