Add stats:price-experiment-funnel: a 2-arm funnel (control vs high) on one shared
decision window. The primary metric is contribution margin per assigned user,
tested with a Welch two-sample test (unequal variances, since the higher-priced
arm carries far more revenue variance); conversion is a Fisher-exact guardrail
against control. Cost uses currently-active connections to match the monthly MRR
flow. The report is framed monitoring-only: decide at the pre-registered horizon,
not on weekly peeks. Extract the shared MonthlyEquivalentPrices lookup so both
funnel collectors resolve Stripe prices through one source.
Víctor Falcón