[stable32] feat(files_versions): Auto-reload versions tab on file

[silverkszlo]

Basically a copy/backup from #57841, which got closed due to me messing up my local commit history.

Summary

This PR adds automatic reloading of the versions sidebar tab when documents are saved, eliminating the need for manual refresh to see new versions. The feature listens to files:node:updated events.

Changes

• Subscribe to files:node:updated events in VersionTab.vue in files_versions
• Automatically reload versions list when the current file is saved
• Add 1-second delay before fetching to allow server time to create new version entry

Testing

Tested on stable32 with Collabora Online:

1. Open a document in Collabora
2. Open versions sidebar tab
3. Make changes and save (Ctrl+S)
4. Versions list automatically updates after ~1 second
5. New version appears without manual refresh

• Resolves: #5267

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)

[blizzz]

/compile

[blizzz]

The unconventional commit message is actually about the [stable32] in the commit message. There it is to be omitted.