Compare two audits

Subtraction over records already on disk. No crawl, no network, no new measurement - so the difference is between two things that were each measured once, rather than between a measurement and a memory.

Preflight

Run this first, once per session:

geo --version

Expected: seomator-geo-audit 1.2.x or newer.

• Command not found -> stop and say: "The geo CLI is not installed. Install it with uv tool install seomator-geo-audit (or pipx install seomator-geo-audit), then run this again."
• Older than 1.2.0 -> stop and say: "This skill needs seomator-geo-audit 1.2.0 or newer. Upgrade with uv tool upgrade seomator-geo-audit."
• Anything else odd -> run geo doctor and relay what it reports.