docs consolidation and others

docs/modules/airgap/guides/devportal-offline.md

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+# DevPortal Offline (DOCS-AIRGAP-DEVPORT-64-001)
+
+How to use the developer portal in fully offline/sealed environments.
+
+## Serving the portal
+- Host static build from local object store or file server; no CDN.
+- Set `DEVPORTAL_OFFLINE=true` to disable external analytics/fonts.
+
+## Auth
+- Use Authority in offline mode with pre-provisioned tenants; cache JWKS locally.
+
+## Bundles
+- Provide mirror/bootstrap bundles via offline download page with hashes and DSSE (if available).
+- Offer time anchors download; display staleness and mirrorGeneration in UI header.
+
+## Search/docs
+- Bundle docs and search index; disable remote doc fetch.
+
+## Telemetry
+- Disable remote telemetry; keep console logs only or send to local OTLP endpoint.
+
+## Verification
+- On load, run self-check to confirm no external requests; fail with clear banner if any detected.