Verification

This build proves attribution logic belongs in a governed data product, not a dashboard black box.

The useful thing here is not the existence of multiple models. It is that the path, model, and revenue-credit output stay visible enough for Growth and finance to challenge them intelligently.

Journey touches stay inspectable before credit is assigned, which keeps attribution debates tied to real rows instead of dashboard mythology.
Model lane surfaces where first-touch, last-touch, linear, and U-shaped logic diverge.
Revenue credit is exposed in machine-readable form so analysts can audit why channels gained or lost influence.