Bump langchain from 1.5.5 to 1.5.8

[dependabot]

Bumps langchain from 1.5.5 to 1.5.8.

Release notes

Sourced from langchain's releases.

langchain@1.5.8

Patch Changes

• #11366 c068bbf Thanks @​hntrl! - fix(core,langchain): patch and release core, update peer dependencies

langchain@1.5.7

Patch Changes

• #11363 2d1f744 Thanks @​hntrl! - feat(langchain): add langsmith gateway to initChatModel- #11362

langchain@1.5.6

Patch Changes

• #11331 18765b0 Thanks @​thushanth-bengre-langchain! - fix(langchain): exclude middleware-internal model calls from the message projection

  Bookkeeping model calls made by summarizationMiddleware and toolEmulatorMiddleware no longer appear in run.messages or stream({ streamMode: "messages" }), and the summary summarizationMiddleware writes back to state is no longer projected as a new message. These calls remain observable via streamEvents({ version: "v2" }), identified by lc_source.

• #11344 f08e0c6 Thanks @​hntrl! - fix: apply [Symbol.hasInstance] method to all comparable properties using .isInstance()

  We have some internal schemas that rely on z.instanceof(). This uses a strict instanceof check which can conflict if there are multiple versions of core installed. This overrides the Symbol.hasInstance method to use the same logic as .isInstance() to compare objects at runtime.

Commits

• 3fedf7f chore: version packages (#11367)
• c068bbf fix(core,langchain): patch and release core, update peer dependencies (#11366)
• 242b986 chore: version packages (#11361)
• 2d1f744 chore(langchain): add missing changeset (#11363)
• f401396 feat(langchain): add langsmith gateway to initChatModel (#11362)
• d36ec6a fix(anthropic): preserve gateway cost on the native stream path (#11359)
• b0a61cf chore: version packages (#11343)
• 3fe4c43 fix(openai): include usage in response_metadata when system_fingerprint is ab...
• f08e0c6 fix(core,langchain): override instanceof where applicable (#11344)
• 18765b0 fix(langchain): exclude middleware-internal model calls from the message proj...
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot show <dependency name> ignore conditions will show all of the ignore conditions of the specified dependency
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)