chore: update minimum redis version to >=7

Author: yju0808

pyproject.toml

@@ -41,7 +41,7 @@ litellm = ["litellm>=1.67.4.post1, <2"]
 realtime = ["websockets>=15.0, <16"]
 sqlalchemy = ["SQLAlchemy>=2.0", "asyncpg>=0.29.0"]
 encrypt = ["cryptography>=45.0, <46"]
-redis = ["redis>=6.4.0"]
+redis = ["redis>=7"]
 dapr = ["dapr>=1.16.0", "grpcio>=1.60.0"]
 
 [dependency-groups]