chore(deps): bump langchain from 0.3.27 to 1.2.10

Bumps [langchain](https://github.com/langchain-ai/langchain) from 0.3.27 to 1.2.10.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain==0.3.27...langchain==1.2.10)

---
updated-dependencies:
- dependency-name: langchain
  dependency-version: 1.2.10
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -8,7 +8,7 @@ fastapi>=0.122.0
 niquests>=3.17.0
 # fix the langchain package versions to avoid long computation in pip dep resolution
 # langchain is stuck at <1.0.0 due to langhchain-unstructured not being updated yet
-langchain==0.3.27
+langchain==1.2.10
 langchain-community==0.3.21
 langchain-postgres==0.0.16
 langchain-unstructured==0.1.6