Show previous scrambles for completed solves

[coder13]

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.