fix(2479): send the latest feedback id in staff feedback list items

[syphax-FN]

Brief description of changes applied

The backend now returns latestFeedbackId (the id of the student's most recent feedback for the activity) alongside id in FeedbackStaffListItemDTO. The "All feedback requests" list now navigates to the detail page using this new id instead of the clicked feedback's own id, which could be an older iteration not present in feedbacksByActivity, leaving the student selector empty on the detail page.

Reference to an Issue, Feature, Task, User Story or another PR

Related to #2479

Target Branch

develop

Additional Notes

Fix approach suggested by @pascal-beger in Mattermost discussion — the backend should send the correct id from the start instead of compensating on the frontend.

Known Limitations or Side Effects

FeedbackHistoryCard, FeedbackLongIconCard and notifications are not touched (out of scope for this fix).

---

✅ Checklist

• a11y tested (if the PR includes frontend changes)
• Tests provided (including unit and integration tests for both frontend and backend)
• i18n handled (texts are translated)
• Performance tests
• No unnecessary code (e.g., debug logs, commented code)
• Code style and formatting rules respected (linting, conventions, etc.)
• Semantic Versioning respected
• Add to CHANGELOG.md file all properties and database change and details for the update process

[p-beger]

Ça me semble bon, merci Syphax !