feat: add Redis password configuration to Redis client in config.py

- Updated the Redis client initialization to include password retrieval from environment variables, enhancing security and flexibility in Redis connections.

Author: atyrode

src/backend/config.py

@@ -24,6 +24,7 @@
 # Redis connection
 redis_client = redis.Redis(
     host=os.getenv('REDIS_HOST', 'localhost'),
+    password=os.getenv('REDIS_PASSWORD', None),
     port=int(os.getenv('REDIS_PORT', 6379)),
     db=0,
     decode_responses=True