refactor: simplify architecture and harden lifecycle

Remove obsolete implementations, centralize background task ownership and terminal-state recovery, consolidate frontend routing and log streaming, and enforce project-wide verification in CI.

server/internal/storage/rclone/registry.go

@@ -0,0 +1,21 @@
+package rclone
+
+import "backupx/server/internal/storage"
+
+// NewDefaultRegistry returns the storage factory set shared by Master, Agent,
+// and the standalone Backint process.
+func NewDefaultRegistry() *storage.Registry {
+	registry := storage.NewRegistry(
+		NewLocalDiskFactory(),
+		NewS3Factory(),
+		NewWebDAVFactory(),
+		NewGoogleDriveFactory(),
+		NewAliyunOSSFactory(),
+		NewTencentCOSFactory(),
+		NewQiniuKodoFactory(),
+		NewFTPFactory(),
+		NewRcloneFactory(),
+	)
+	RegisterAllBackends(registry)
+	return registry
+}