Bump black from 24.10.0 to 25.11.0 in /server

Bumps [black](https://github.com/psf/black) from 24.10.0 to 25.11.0.
- [Release notes](https://github.com/psf/black/releases)
- [Changelog](https://github.com/psf/black/blob/main/CHANGES.md)
- [Commits](psf/black@24.10.0...25.11.0)

---
updated-dependencies:
- dependency-name: black
  dependency-version: 25.11.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

server/requirements.txt

@@ -40,7 +40,7 @@ uvicorn[standard]==0.34.2
 
 # dev
 daphne==4.2.*
-black==24.10.0
+black==25.11.0
 isort==6.0.1
 flake8==7.2.0
 pytest==8.3.5