Show rate, source attribution, conversion-by-stage reporting.
Source: Bishop Deliverables doc (Drive). Build-flow + gap map: https://visionplay-internaldocs.pages.dev/onlythebes-build-flow
Before E2E test: confirm the OnlyTheBes sub-account (loc rHAJ5viD9NfIsd5VftPd) is active, run a controlled test, verify before marking done.