fix: forward paymentsOnly and standardLayout correctly

[miachillgood]

Summary

• pass both paymentsOnly and standardLayout through to getReportProfitAndLoss in the correct positions
• add a handler test that verifies the SDK receives those arguments without positional drift

Why

Issue #138 reports that paymentsOnly has no effect in get-profit-and-loss. The handler accepted both paymentsOnly and standardLayout, but only forwarded one boolean argument into getReportProfitAndLoss. That shifted standardLayout into the paymentsOnly slot and dropped the real standardLayout value before the SDK call.

Validation

• npm test
• npm run lint

Closes #138