[api] Bump uvicorn from 0.34.2 to 0.35.0 in /backend

Bumps [uvicorn](https://github.com/encode/uvicorn) from 0.34.2 to 0.35.0.
- [Release notes](https://github.com/encode/uvicorn/releases)
- [Changelog](https://github.com/encode/uvicorn/blob/master/docs/release-notes.md)
- [Commits](Kludex/uvicorn@0.34.2...0.35.0)

---
updated-dependencies:
- dependency-name: uvicorn
  dependency-version: 0.35.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

backend/poetry.lock

@@ -17,7 +17,7 @@ litestar = {extras = ["prometheus"], version = "^2.16.0"}
 httpcore = "^1.0.9"
 gunicorn = "23.0.0"
 pydantic = "^2.11.5"
-uvicorn = {extras = ["standard"], version = "^0.34.2"}
+uvicorn = {extras = ["standard"], version = "^0.35.0"}
 tomli = "^2.2.1"
 
 [tool.poetry.group.dev.dependencies]