docs: sync long horizon state after metadata sweep

[DeliciousBuding]

Summary

• Sync the long-horizon state table after the public metadata asset sweep.
• Record that the HF/GitHub metadata branch is closed unless a real manifest or small replay packet appears.

Verification

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

[gemini-code-assist]

Code Review

This pull request updates the ROADMAP.md file to reflect the completion of a public metadata asset sweep, including updates to the 'CPU sidecar' status and the addition of a 'Latest closed search branch' entry. Feedback suggests using a slash separator for the public-metadata gate to maintain stylistic consistency and highlights a discrepancy with the 'CPU sidecar' status in another section of the document.

[gemini-code-assist]

The addition of and public-metadata at the end of the slash-separated list is stylistically inconsistent with the preceding items. For better consistency and to match the established pattern for gate categories in this table, consider using a slash separator. Additionally, note that the CPU sidecar status in the Sync 字段 table (line 1983) still references the CopyMark gate, which creates an inconsistency in the document's current state summary.

Suggested change

	| CPU sidecar | none selected after public metadata asset sweep. The admitted bundle remains five-row `admitted-only`; recent watch/watch-plus/support-only/candidate/score-artifact/semantic-shift/defense-watch and public-metadata gates did not change Platform/Runtime rows, schemas, product copy, downloads, or GPU release. |
	| CPU sidecar | none selected after public metadata asset sweep. The admitted bundle remains five-row `admitted-only`; recent watch/watch-plus/support-only/candidate/score-artifact/semantic-shift/defense-watch/public-metadata gates did not change Platform/Runtime rows, schemas, product copy, downloads, or GPU release. |

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