discovery now filters results by minimum occurrences

discovery scans now have a minimum occurrences filter. set any threshold from 1 to 100 to hide rare or one-off patterns and keep only setups that have shown up enough times in the historical data.

results update as soon as you move the filter, with no rescan needed, and the filter works the same on desktop and mobile. it matches the sample size filter already available in What's in Play.