chore(deps-dev): bump the langchain group across 1 directory with 2 updates

Bumps the langchain group with 2 updates in the / directory: [langchain-core](https://github.com/langchain-ai/langchain) and [langchain-openai](https://github.com/langchain-ai/langchain).


Updates `langchain-core` from 1.2.22 to 1.7.0
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain-core==1.2.22...langchain-core==1.7.0)

Updates `langchain-openai` from 1.1.12 to 1.7.2
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain-openai==1.1.12...langchain-openai==1.7.2)

---
updated-dependencies:
- dependency-name: langchain-core
  dependency-version: 1.6.7
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: langchain
- dependency-name: langchain-openai
  dependency-version: 1.6.7
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: langchain
...

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Author: dependabot[bot]