Use exact frozen diffs to trace reversals and restorations

When analyzing licensing or governance changes, ground conclusions in exact PR metadata, line-level patches, and documentation edits. Compare related PRs as a sequence: identify what the earlier revert removed and verify whether the later PR restored the same schema fields, validation rules, configuration decoding, runtime commands, and documentation. Preserve precise thresholds, error messages, dates, and merge status. Distinguish demonstrated software enforcement from broader claims about when an underlying external license policy became effective, and explicitly note evidence bounds or incidental changes such as whitespace or missing trailing newlines.