docs: triage lightweight diffusion MIA repos

[DeliciousBuding]

Summary

• add a compact anti-duplication triage for lightweight/course-style GitHub diffusion-MIA search hits
• record why acha1934, KarinMalka1, abramwit, and josephho9 repos do not provide clean target/split/response/score assets
• sync roadmap, AGENTS, evidence overview, reproduction status, intake notes, and challenger queue

Checks

• git diff --check
• python -X utf8 scripts/check_public_surface.py
• python -X utf8 scripts/check_markdown_links.py
• python -X utf8 scripts/run_pr_checks.py

[Copilot]

Copilot encountered an error and was unable to review this pull request. You can try again by re-requesting a review.

[gemini-code-assist]

Code Review

This pull request documents the triage of four GitHub repositories identified as potential diffusion-model membership inference attack assets. The triage determined that these repositories are lightweight or course-style reproductions lacking essential artifacts such as public target checkpoints, immutable member manifests, or reusable score packets. As a result, the project's roadmap, evidence indices, and status reports have been updated to classify these hits as false-positive search evidence, with no changes to the current GPU or CPU work allocations. I have no feedback to provide as there were no review comments.