Fix Redis 8.x timeout in Channels

redis-py 8.0.0 changed default `socket_timeout` from None to 5 seconds.
This causes a race condition with Django Channels' blocking Redis commands
(BZPOPMIN/BRPOP with 5s server-side timeout), resulting in:
`redis.exceptions.TimeoutError: Timeout reading from localhost:6379`

Fix: Set `socket_timeout: None` in CHANNEL_LAYERS config to disable
client-side timeout, allowing server-side blocking commands to complete.

Source: redis/redis-py#4091

Author: gabbygator184

robosats/settings.py

@@ -254,7 +254,12 @@
     "default": {
         "BACKEND": "channels_redis.core.RedisChannelLayer",
         "CONFIG": {
-            "hosts": [config("REDIS_URL")],
+            "hosts": [
+                {
+                    "address": config("REDIS_URL"),
+                    "socket_timeout": None,
+                }
+            ],
         },
     },
 }