feat(backup): 添加远端备份功能并优化备份管理

backend/package.json

@@ -14,7 +14,8 @@
     "format:check": "prettier --check \"**/*.js\""
   },
   "dependencies": {
-    "axios": "^1.13.4",
+    "axios": "^1.13.6",
+    "basic-ftp": "^5.0.3",
     "bcryptjs": "^3.0.3",
     "cors": "^2.8.5",
     "csv-parser": "^3.2.0",
@@ -27,11 +28,14 @@
     "joi": "^18.0.2",
     "jsonwebtoken": "^9.0.3",
     "multer": "^2.1.1",
-    "mysql2": "^3.16.0",
+    "mysql2": "^3.19.1",
     "node-cron": "^4.2.1",
-    "sequelize": "^6.32.1",
-    "sqlite3": "^5.1.6",
+    "sequelize": "^6.37.8",
+    "smb2": "^0.2.2",
+    "sqlite3": "^5.1.7",
+    "ssh2-sftp-client": "^9.1.0",
     "three": "^0.182.0",
+    "webdav": "^5.3.1",
     "winston": "^3.19.0",
     "winston-daily-rotate-file": "^5.0.0",
     "xlsx": "^0.18.5"