feat: Add column sorting to all TUI DataTable screens (Fixes #74)

[Bhagyashri77777]

What does this PR do?

This PR adds column sorting functionality to all the Textual DataTable screens in the TUI, solving Issue #74 under GSSoC 2026!

Implementation Details

Instead of hardcoding the sorting logic into every single screen file, I created a reusable custom component to keep the codebase clean and modular:

• Created a new SortableDataTable class in adiuvare/tui/sortable_table.py.
• The logic supports 3 states on header click: Ascending (A-Z) -> Descending (Z-A) -> Default/None.
• Replaced the standard DataTable with our new SortableDataTable in:
  • adiuvare/tui/screens/audit.py
  • adiuvare/tui/screens/changes.py
  • adiuvare/tui/screens/events.py

Acceptance Criteria Met

• All DataTable column headers are clickable for sorting.
• Ascending and descending sort both work correctly.
• Sorting applied consistently across all screens.
• Default order restored on the third click.

[Bhagyashri77777]

Hi @0-Shimanshu

My end-semester exams are finally over, and I've successfully completed the feature as promised!

I created a central SortableDataTable class and injected it into the various screens to make sure the codebase stays clean and easy to maintain. I have tested it locally using the TUI and everything works perfectly.

Could you please review this PR when you have some time? Let me know if any changes are needed. Happy to be contributing to ADIUVARE for GSSoC 2026!

[Wahid7852]

Thanks for the contribution. Before review, please get the branch back to a clean state:

Remove the accidentally committed adiuvare.yaml.
Fix all failing CI checks.
The current implementation does not appear to restore the original row order on the third click; it only resets the internal sort state.
Please add tests covering ascending, descending, and reset behavior.
Keep unrelated UI/content changes out of the PR unless they are required for the feature.