docs: close navigation and mission archive gaps

docs/ADMIN-GUIDE/README.md

@@ -7,7 +7,7 @@ This book is the canonical home for installation, configuration, deployment, rou
 ## Start here
 
 - [Documentation atlas](../README.md) — placement rules and source-of-truth boundaries.
-- [Documentation sitemap](../SITEMAP.md) — existing navigation is transitional and still contains legacy paths.
+- [Documentation sitemap](../SITEMAP.md) — resolvable current navigation and authority-gated migration summary.
 - [Product requirements](../PRD.md) — normative requirements, currently marked draft.
 - [Operations index](operations/README.md) — current local procedures and explicitly held operational outlines.
 - [Security index](security/README.md) — current SSO provider configuration.
@@ -33,8 +33,9 @@ Every promoted page must be added to this index and to [`SITEMAP.md`](../SITEMAP
 
 These are source candidates, not verified runbooks:
 
-- [`_old_structure/guides/admin-guide.md`](../_old_structure/guides/admin-guide.md) — historical source; verify claims before promotion.
-- [`_old_structure/guides/deployment.md`](../_old_structure/guides/deployment.md) — historical source; verify commands and deployment assumptions before promotion.
+- `_old_structure/guides/admin-guide.md` — quarantined historical source; verify claims before promotion.
+- `_old_structure/guides/deployment.md` — quarantined historical source; deployment commands and assumptions remain held.
+- See the [documentation catalog](../reports/documentation/2026-08-10-docs-catalog-audit.md) for file-level dispositions.
 
 Do not treat a migration candidate as current until its commands, paths, permissions, and safety status are checked against source and tests.