Mark legacy protocol and direct example as withdrawn historical material

Align X-Ray cards and metadata with current VG1 status

Append Model X-Ray evidence correction — 6 September 2026

card: corrected twin benchmark gap with CI; example-report N80 no longer quoted out of version

Example table: retire floor-derived spread; station convention + N80

docs link

Free open beta banner (limited time — local-GPU capacity)

Lesion X-ray: six 1B-class models, one pre-registered protocol

initial commit