chore(deps): bump langchain from 0.3.25 to 0.3.27

Bumps [langchain](https://github.com/langchain-ai/langchain) from 0.3.25 to 0.3.27.
- [Release notes](https://github.com/langchain-ai/langchain/releases)
- [Commits](langchain-ai/langchain@langchain==0.3.25...langchain==0.3.27)

---
updated-dependencies:
- dependency-name: langchain
  dependency-version: 0.3.27
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

poetry.lock

@@ -13,7 +13,7 @@ python = "^3.10"
 pydantic = "2.*"
 fastapi = "^0.111.0"
 nc-py-api = {extras = ["app"], version = "0.*"}
-langchain = "^0.3.25"
+langchain = "^0.3.27"
 httpx = "^0.28.1"
 langchain-community = "^0.3.24"
 llama-cpp-python = "^0.3.9"