feat: add upload_time support to file search and recent files

[cristianscheid]

• Resolves: #

Summary

This PR adds support for the upload_time property in file search queries, enabling filtering and ordering by when files were uploaded to the server.

An additional frontend PR was opened on nextcloud-libraries/nextcloud-files to utilize this new capability:

• feat(recent-search): include recently uploaded files in addition to modified files nextcloud-libraries/nextcloud-files#1498

This backend PR is independent and can be merged first, as it only adds new functionality and should not break existing behavior.

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)

[cristianscheid]

/backport to stable33

[susnux]

Either my search was not good or thats the wrong property.

[susnux]

Looks good.

But please update the docs after merge:
https://docs.nextcloud.com/server/stable/developer_manual/client_apis/WebDAV/search.html#supported-dav-properties

( https://github.com/nextcloud/documentation/ )

[cristianscheid]

Looks good.

But please update the docs after merge: https://docs.nextcloud.com/server/stable/developer_manual/client_apis/WebDAV/search.html#supported-dav-properties

( https://github.com/nextcloud/documentation/ )

Will do! Thanks for sharing the link for the docs.

[cristianscheid]

@susnux I've opened this PR to update the doc accordingly: nextcloud/documentation#14076