Inform users of missing files in archive

[salmart-dev]

• Resolves: [Enhancement] ZipFolderPlugin fails silently on errors #58825

Took over some of the changes from #57335, thanks @Koc

Summary

The ZipFolderPlugin halts the streaming of an archive for download due to various factors, such as storage issues with a file, temporary database problems, or a lost network connection. Because the plugin streams without a content-length header, the user receives an incomplete archive without any warning. In some cases, this issue only becomes apparent when attempting to open a file in the archive and discovering that the entire archive is corrupted.

This PR partially addresses the problem by introducing a new working mode for the plugin. If the configuration value for archive_report_missing_files is set to true the following happens:

• files that are marked as not downloadable will not block producing the whole archive, unless the root directory where the download is started from is marked as not downloadable
• a missing_files.json file is added within the archive if any file or directories are missing due to errors, along with the cause
• streams are checked to confirm that they have been fully consumed, to avoid silently archiving files partially

TODO

• Write tests
• Translations
• Update documentation where needed

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)
• Labels added where applicable (ex: bug/enhancement, 3. to review, feature component)
• Milestone added for target branch/version (ex: 32.x for stable32)

AI (if applicable)

• The content of this PR was partly or fully generated using AI

[salmart-dev]

Closing in favor of: #59049 (branch name corrected with feature)