kaizen-sweep

Drain a cat-factory deployment's Kaizen backlog into docs/internal/kaizen-tracker.md and open the PR. Takes the path to a .env holding the deployment's public-API key. Use when asked to sweep, pull or triage Kaizen entries or gradings ("what have the graders been saying", "file the kaizen recommendations", "run a kaizen sweep against ~/.cat-factory.env", "update the kaizen tracker").