Agent Skills: kaizen-review-prep

Friday late-morning synthesis. Runs ~2 hours after `kaizen-research` the same morning. Consumes this week's research doc, open items in `docs/kaizen/review-queue.md`, last weekend's POC findings (from comments on the previous week's research PR), and recent merges/reverts/CI signal — produces a ranked, decision-oriented agenda. Every item has a Ship / Decline / Defer recommendation. Opens a PR into `develop`. Triggers: "kaizen review prep", "weekly review prep", "friday review", "rank kaizen ideas".