Fix up some code after aplanas' continued review

lib/db_revision.py

@@ -2,6 +2,7 @@ from __future__ import annotations
 
 import logging
 from hashlib import md5
+from pathlib import PurePath
 from typing import Optional
 
 from lib.db import DB
@@ -223,11 +224,11 @@ class DBRevision:
         for entry in self.files_list(db):
             if old_files.get(entry["name"]) != f"{entry['md5']}-{entry['size']}":
                 logging.debug(f"Download {entry['name']}")
-                to_download.append((entry["name"], entry["md5"]))
+                to_download.append((PurePath(entry["name"]), entry["md5"]))
             old_files.pop(entry["name"], None)
         for entry in old_files.keys():
             logging.debug(f"Delete {entry}")
-            to_delete.append(entry)
+            to_delete.append(PurePath(entry))
         return to_download, to_delete
 
     @staticmethod