refactor(valkey): use async DocumentStore mixin tests (#3060)

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-authored-by: David S. Batista <dsbatista@gmail.com>

Author: 3 people

integrations/valkey/pyproject.toml

@@ -26,7 +26,7 @@ classifiers = [
   "Programming Language :: Python :: Implementation :: CPython",
   "Programming Language :: Python :: Implementation :: PyPy",
 ]
-dependencies = ["haystack-ai>=2.26.1", "valkey-glide>=2.2.0", "valkey-glide-sync>=2.2.0"]
+dependencies = ["haystack-ai>=2.28.0", "valkey-glide>=2.2.0", "valkey-glide-sync>=2.2.0"]
 
 [project.urls]
 Documentation = "https://github.com/deepset-ai/haystack-core-integrations/tree/main/integrations/valkey#readme"