Service Revenue totals read customer currencies only where they price a lead

The Service Leads board and the vendor metrics page now look up a customer’s currency only for a lead whose figure is still the average of its bids, the one figure that currency names. Every other lead skips that lookup, so each board render does less work. A customer’s page also reads that customer once instead of twice.

A new test follows a lead from how it is stored to the board’s total. If the total ever loses the customer’s currency, the test fails, instead of a bid-priced lead quietly showing in euros. Figures and currencies on screen are unchanged.