v8.0.0-rc.4-dev.16: chore: close the aggregate-pagination project (#30100)

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Closes the aggregate-pagination project and removes its working artifacts. Documentation-only — no source, no tests, no behaviour. ⚠️ Merge order This must merge after #30098 . That PR lands the project's retro learnings into drive/calibration/dod.md and the upgrade-instructions skill. This project produced no long-lived documentation to migrate — the one guide it wrote was deleted on review — so the learnings are i…

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