Review Power BI diff

Turn a large, unreadable PBIP diff (hash-named visual.json files, TMDL model files) into a single review artifact: an executive summary of what was built, page wireframes showing what changed where, spec-checked measures with full DAX, and a ranked red-flags list. The reviewer is a Power BI expert, so show raw DAX and exact bindings.

Input: an optional git ref range as the argument (A...B, A..B, or a single base ref meaning "vs working tree"). Default: main...HEAD. The user may also name pages to treat as scratch, beyond the automatic rule below.

Scope: review and report. Findings go in the artifact, not into edits to the PBIP files, the DAX, or an issue tracker.

Step 1: extract the change model (deterministic)

Run the bundled extractor, outputting to the scratchpad: