merge: 合并 upstream/main 解决 PR #37 冲突

- 删除 backend/internal/model/account.go 符合重构方向
- 合并最新的项目结构重构
- 包含 SSE 格式解析修复
- 更新依赖和配置文件

deploy/docker-compose.yml

@@ -141,6 +141,8 @@ services:
       ${REDIS_PASSWORD:+--requirepass ${REDIS_PASSWORD}}
     environment:
       - TZ=${TZ:-Asia/Shanghai}
+      # REDISCLI_AUTH is used by redis-cli for authentication (safer than -a flag)
+      - REDISCLI_AUTH=${REDIS_PASSWORD:-}
     networks:
       - sub2api-network
     healthcheck: