Show previous scrambles for completed solves

Users should be able to view scrambles associated with completed solves.

Feedback source:
- Viewing previous solves' scrambles.
- Add ability to see previous scrambles.
- Put scrambles to be seen after having done the solve.
- Not allowing a solver to access a scramble they have previously done in the timing area, while still being able to access it in chat/history.

Acceptance ideas:
- Store/display the scramble for each completed attempt.
- Make previous scrambles accessible from result history or solve details.
- Keep completed scramble review separate from the active timing area.
- Define behavior when a room expires or is deleted.

Start by tracing how completed attempts are stored and how result history or solve details are displayed. Check the active timing area and room expiration or deletion behavior before choosing an entry point. Done means each completed solve exposes its scramble in history without making it available through the active timing flow.

Scritto dal modello di indicizzazione a partire dal testo della issue.