feat: Graceful shutdown (10s)；backup 格式兼容 .dump.gz；容器连接监控

lib/common.sh

@@ -279,8 +279,8 @@ backup_database() {
 }
 
 cleanup_old_db_backups() {
-    local keep="${1:-1}"
-    local to_del; to_del=$(remote "ls -t ${REMOTE_DIR}/backups/${DB_NAME}_*.dump 2>/dev/null | tail -n +$((keep+1))" || echo "")
+    local keep="${1:-7}"
+    local to_del; to_del=$(remote "ls -t ${REMOTE_DIR}/backups/${DB_NAME}_*.dump* 2>/dev/null | tail -n +$((keep+1))" || echo "")
     [ -z "$to_del" ] && return 0
     log_step "清理旧数据库备份（保留 ${keep} 个）..."
     echo "$to_del" | while read -r f; do [ -n "$f" ] && remote "rm -f '${f}'" 2>/dev/null && echo "  删除: $(basename "$f")" || true; done

src/main.rs

@@ -325,6 +325,7 @@ async fn main() -> std::io::Result<()> {
                 create_server_config(pool_clone.clone(), http_client_clone.clone(), app_state_clone.clone())
             })
             .keep_alive(std::time::Duration::from_secs(30))
+            .shutdown_timeout(10)
             .backlog(1024)
             .bind_openssl(&addr, ssl_builder)
             {
@@ -348,6 +349,7 @@ async fn main() -> std::io::Result<()> {
                 create_server_config(pool_clone.clone(), http_client_clone.clone(), app_state_clone.clone())
             })
             .keep_alive(std::time::Duration::from_secs(30))
+            .shutdown_timeout(10)
             .backlog(1024)
             .bind(&addr)
             {