Signal that a question has been returned from the cache (on dashboards)

**Is your feature request related to a problem? Please describe.**
Could be a cool thing that we signal to users that a question is being returned from the cache on the dashboards

**Describe the solution you'd like**
A little icon on the top of the cards in the dashboards to signal that we returned a question from the cache

**Describe alternatives you've considered**
None

**How important is this feature to you?**
Cool to have

**Additional context**
NA

Start by tracing how dashboard cards render questions and how the cache result reaches the dashboard. Confirm what response state identifies a cached question, then define the dashboard card icon and its visibility for cached results; done means cached questions are visibly distinguished without changing non-cached cards.

Written by the indexing model from the issue text.