docs: sync roadmap current research state

[DeliciousBuding]

Summary

• sync the Research ROADMAP current-state slots with the latest H2 output-cloud verdict
• keep ReDiffuse STL-10 closed after weak denoising-loss and score-norm scouts
• keep feature-packet consumption deferred and outside Platform/Runtime rows

Checks

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

[gemini-code-assist]

Warning

You have reached your daily quota limit. Please wait up to 24 hours and I will start processing your requests again!