test: establish native page-removal and recycle references

Capture eleven synthetic OneNote 2010 removal cases and independent cold reopens.
Compare source tombstones, retained page history, remapped reference graphs and
recycled payload bytes. Add text and attachment mutation controls and retain
reader sanitizer inputs.

Assisted-by: gpt-6-astra
dc3ffc4edaclover caruso committed on 9/9/2026, 8:08:47 AMparentb05388e
64 files changedLine totals unavailable