Deliver ADR cleanup packets and publish first-wave arc42 stubs

Packets go to seven owning repos by inbox and checklist. Railiance,
NetKingdom, and State Hub now have published architecture stubs.

docs/adr-review/packets/net-kingdom.md

@@ -0,0 +1,24 @@
+# Cleanup packet — net-kingdom
+
+From POLICY-NEXUS-WP-0003-T05. Do not apply in policy-nexus.
+
+## Blocking
+
+| File | Action |
+| --- | --- |
+| `canon/standards/iam-profile_v0.2.md` | Set `status: superseded`. Successor is v0.3. Id `netkingdom-iam-profile` is shared. |
+| `canon/standards/iam-profile_v0.3.md` | Change `id` to `netkingdom-iam-profile-v0.3` (or similar unique id). Then it can be published. |
+
+## Ready to publish after prefix + review metadata
+
+`docs/adr/ADR-0006` through `ADR-0015`. Suggested ids `NK-ADR-0006` …
+`NK-ADR-0015`. Add `owner`, `revision`, `last_reviewed` /
+`review_interval`.
+
+These are unreviewed for relevance except as NetKingdom chapter 9
+candidates. Default if they only bind NetKingdom implementers: still
+`publish` — they constrain flex-auth, key-cape, tenant-engine.
+
+## Already published
+
+- Tenancy Posture at `/standards/tenancy-posture/v0.1/`.