Build(deps): Bump the uv group across 3 directories with 4 updates (#307)

Bumps the uv group with 3 updates in the /backend directory: [langsmith](https://github.com/langchain-ai/langsmith-sdk), [pypdf](https://github.com/py-pdf/pypdf) and [vcrpy](https://github.com/kevin1024/vcrpy).
Bumps the uv group with 2 updates in the /evaluation directory: [langsmith](https://github.com/langchain-ai/langsmith-sdk) and [vcrpy](https://github.com/kevin1024/vcrpy).
Bumps the uv group with 1 update in the /frontend directory: [pydantic-settings](https://github.com/pydantic/pydantic-settings).


Updates `langsmith` from 0.8.4 to 0.8.18
- [Release notes](https://github.com/langchain-ai/langsmith-sdk/releases)
- [Commits](langchain-ai/langsmith-sdk@v0.8.4...v0.8.18)

Updates `pypdf` from 6.13.0 to 6.13.3
- [Release notes](https://github.com/py-pdf/pypdf/releases)
- [Changelog](https://github.com/py-pdf/pypdf/blob/main/CHANGELOG.md)
- [Commits](py-pdf/pypdf@6.13.0...6.13.3)

Updates `vcrpy` from 8.1.1 to 8.2.1
- [Release notes](https://github.com/kevin1024/vcrpy/releases)
- [Changelog](https://github.com/kevin1024/vcrpy/blob/master/docs/changelog.rst)
- [Commits](kevin1024/vcrpy@v8.1.1...v8.2.1)

Updates `langsmith` from 0.8.4 to 0.8.18
- [Release notes](https://github.com/langchain-ai/langsmith-sdk/releases)
- [Commits](langchain-ai/langsmith-sdk@v0.8.4...v0.8.18)

Updates `vcrpy` from 8.1.1 to 8.2.1
- [Release notes](https://github.com/kevin1024/vcrpy/releases)
- [Changelog](https://github.com/kevin1024/vcrpy/blob/master/docs/changelog.rst)
- [Commits](kevin1024/vcrpy@v8.1.1...v8.2.1)

Updates `pydantic-settings` from 2.14.1 to 2.14.2
- [Release notes](https://github.com/pydantic/pydantic-settings/releases)
- [Commits](pydantic/pydantic-settings@v2.14.1...v2.14.2)

---
updated-dependencies:
- dependency-name: langsmith
  dependency-version: 0.8.18
  dependency-type: direct:production
  dependency-group: uv
- dependency-name: pypdf
  dependency-version: 6.13.3
  dependency-type: direct:production
  dependency-group: uv
- dependency-name: vcrpy
  dependency-version: 8.2.1
  dependency-type: indirect
  dependency-group: uv
- dependency-name: langsmith
  dependency-version: 0.8.18
  dependency-type: direct:production
  dependency-group: uv
- dependency-name: vcrpy
  dependency-version: 8.2.1
  dependency-type: indirect
  dependency-group: uv
- dependency-name: pydantic-settings
  dependency-version: 2.14.2
  dependency-type: indirect
  dependency-group: uv
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

backend/pyproject.toml

@@ -25,7 +25,7 @@ dependencies = [
     "langchain-ollama>=1.0.1",
     "langgraph>=1.1.0",
     "langgraph-checkpoint>=4.0.0",
-    "langsmith>=0.8.0",
+    "langsmith>=0.8.18",
     "markdown==3.8.2",
     "myst-parser==4.0.1",
     "nest-asyncio>=1.6.0",
@@ -35,7 +35,7 @@ dependencies = [
     "psycopg2-binary>=2.9.11",
     "pydantic>=2.11.7",
     "pygments>=2.20.0",
-    "pypdf==6.13.0",
+    "pypdf==6.13.3",
     "rank-bm25==0.2.2",
     "rich>=13.7.0",
     "sentence-transformers>=5.1.0",