run_page_pair_diff now invokes compute_formatting_diff alongside the
LLM call for each aligned pair. When the deterministic layer finds
typographic flips on a page the LLM saw as identical, the pair is
re-classified as having differences with medium severity. Each
aggregated finding contributes to the global medium-severity tally.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
