Bump langchain-openai from 0.3.33 to 1.0.0

Bumps [langchain-openai](https://github.com/langchain-ai/langchain) from 0.3.33 to 1.0.0.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain-openai==0.3.33...langchain-openai==1.0.0)

---
updated-dependencies:
- dependency-name: langchain-openai
  dependency-version: 1.0.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -7,7 +7,7 @@ langchain-anthropic==0.3.22
 langchain-community==0.3.31
 langchain-google-genai==2.1.12
 langchain-mistralai==0.2.12
-langchain-openai==0.3.33
+langchain-openai==1.0.1
 langgraph==0.6.10
 libmozdata==0.2.12
 llama-cpp-python==0.2.90