chore: change backup archive name style

backend/bot/services/backup_archive.py

@@ -1,15 +1,20 @@
 import hashlib
 import json
 import zipfile
+from datetime import datetime
 from pathlib import Path
 from typing import Any
 
 BACKUP_APP_ID = "remnawave-minishop"
-BACKUP_FILENAME_PREFIX = "remnawave-minishop-backup-"
+BACKUP_FILENAME_PREFIX = "minishop-"
 BACKUP_FORMAT_VERSION = 1
 BACKUP_MANIFEST_NAME = "manifest.json"
 
 
+def backup_filename_timestamp() -> str:
+    return datetime.now().astimezone().strftime("%Y%m%d-%H-%M")
+
+
 def file_sha256(path: Path) -> str:
     digest = hashlib.sha256()
     with path.open("rb") as handle: