update: chunk upload

cleaner.go

@@ -51,6 +51,15 @@ func startCleaner() {
 			log.Fatalf("add cron job failed: %v", err)
 		}
 		c.Start()
+		// 分片目录独立清理: 复用同一周期, 清掉孤儿分片并释放预留配额
+		go func() {
+			cleanupChunks(*fileTTL) // 启动先清一轮, 处理上次进程遗留
+			ticker := time.NewTicker(*scanEvery)
+			defer ticker.Stop()
+			for range ticker.C {
+				cleanupChunks(*fileTTL)
+			}
+		}()
 		log.Printf("[cleaner] started, schedule=@every %s dir=%s ttl=%s",
 			scanEvery, *uploadDir, *fileTTL)
 	})