Chore(deps): Update redis[hiredis] requirement

Updates the requirements on [redis[hiredis]](https://github.com/redis/redis-py) to permit the latest version.
- [Release notes](https://github.com/redis/redis-py/releases)
- [Changelog](https://github.com/redis/redis-py/blob/master/CHANGES)
- [Commits](https://github.com/redis/redis-py/compare/v6.4.0...v8.1.0)

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

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

pyproject.toml

@@ -67,7 +67,7 @@ dependencies = [
   "python-ipware~=3.0.0",
   "python-magic~=0.4.27",
   "rapidfuzz~=3.14.5",
-  "redis[hiredis]~=6.4.0",
+  "redis[hiredis]>=6.4,<8.2",
   "regex>=2026.7.19",
   "scikit-learn~=1.9.0",
   "sentence-transformers>=5.6.1",