Bump redis from 6.4.0 to 7.0.1 in /server

Bumps [redis](https://github.com/redis/redis-py) from 6.4.0 to 7.0.1.
- [Release notes](https://github.com/redis/redis-py/releases)
- [Changelog](https://github.com/redis/redis-py/blob/master/CHANGES)
- [Commits](redis/redis-py@v6.4.0...v7.0.1)

---
updated-dependencies:
- dependency-name: redis
  dependency-version: 7.0.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

server/requirements.txt

@@ -4,5 +4,5 @@ fastapi==0.119.1
 python-multipart==0.0.20
 pygments==2.19.2
 uvicorn[standard]==0.38.0
-redis==6.4.0
+redis==7.0.1
 rq==2.6.0