Fix media scraping rename and compose pulls

docker-compose.standard.yml

@@ -17,6 +17,9 @@ services:
 
   redis:
     image: redis:7-alpine
+    # Redis 只做热缓存，日常更新 MediaStationGo 时不需要重新拉取。
+    # 如需升级 Redis，请先确认兼容性后再手动调整镜像版本并拉取。
+    pull_policy: never
     restart: unless-stopped
     command:
       - redis-server