cache number of consumers in QueueReceiver#3607

yyuan-squareup wants to merge 2 commits intocashapp:mastercashapp/misk:masterfrom

yyuan-squareup:yyuan/cache_number_of_consumers_20251218yyuan-squareup/misk:yyuan/cache_number_of_consumers_20251218Copy head branch name to clipboard