chore(deps): bump redis from 8.0.1 to 8.1.0 in /server/ai-gateway

Bumps [redis](https://github.com/redis/redis-py) from 8.0.1 to 8.1.0.
- [Release notes](https://github.com/redis/redis-py/releases)
- [Changelog](https://github.com/redis/redis-py/blob/master/CHANGES)
- [Commits](redis/redis-py@v8.0.1...v8.1.0)

---
updated-dependencies:
- dependency-name: redis
  dependency-version: 8.1.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

server/ai-gateway/requirements.txt

@@ -7,7 +7,7 @@ uvicorn[standard]==0.49.0
 gunicorn==26.0.0
 openai==2.44.0
 pydantic==2.13.4
-redis==8.0.1
+redis==8.1.0
 python-jose[cryptography]==3.5.0
 httpx==0.28.1
 python-dotenv==1.2.2