[backend] Use configured prefix for redis messaging

packages/backend/src/db/redis.ts

@@ -17,6 +17,6 @@ export function createConnection() {
 }
 
 export const subscriber = createConnection();
-subscriber.subscribe(config.host);
+subscriber.subscribe(config.redis.prefix ?? config.host);
 
 export const redisClient = createConnection();

packages/backend/src/services/stream.ts

@@ -37,7 +37,7 @@ class Publisher {
 				: { type: type, body: value };
 
 		redisClient.publish(
-			config.host,
+			config.redis.prefix ?? config.host,
 			JSON.stringify({
 				channel: channel,
 				message: message,