Restore even if cannot set writable permissions. Fixes #437

[bwmarkle]

No description provided.

[bwmarkle]

@cssjoe says:

the message changed to:
Total Upkeep - Restoration failed
Could not copy file.: wp-config.php
I chown 0:0 wp-config.php for the test restore.
It still says it failed. Should it say success with errors, or partially restored?

I'm going to put this PR on hold so we can get some releases out today.

1. Looks like I missed some logic that needs to be accounted for.
2. Thus far, only 1 report. Edge case?

[codecov-io]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 25.46%. Comparing base (6d78a90) to head (32c9ba5).
⚠️ Report is 82 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #447   +/-   ##
=========================================
  Coverage     25.46%   25.46%           
  Complexity     2920     2920           
=========================================
  Files           202      202           
  Lines         14698    14697    -1     
=========================================
  Hits           3743     3743           
+ Misses        10955    10954    -1     

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[cssjoe]

This may need better result messages.

• Completes successfully
• Completed with errors; partially restored -- Maybe have an expandable file list
• Could not restore -- with the reason(s)

[cssjoe]

Status update (Aug 2026 triage): Still open and still relevant — master still aborts restore when set_writable_permissions() fails (with ZipArchive). Prior hold notes about clearer result messaging (“completed with errors” / partial restore) still apply before merge. PR is mergeable; needs a product decision on messaging, then rebase/merge or a refreshed PR.