docs: the broker DOES add the agent attrs at register since 2026-09-07 — !9's "not implemented yet" was stale on arrival

!9 (d34189c6) rewrote PROTOCOL.md §Where and how and README §Security model
to say monky-ziti does not add #monky-deploy-agent / #openbao-client yet and an
operator adds them by hand. That was verified against monky-ziti at the sweep
HEAD b44c50a4 (2026-09-05), not its live HEAD: monky-ziti ac258352 (2026-09-07
06:12Z, "feat(environments): host_extra_attrs — host-template-only attrs for
the agent's dial right", merged a82359dd) and monky-tenancy !29 9b84f9ee
(06:23Z, app/jobs_backends.py sends host_extra_attrs for non-k8s backends)
landed hours before !9 was opened. Both sentences now state what happens:
tenancy sends the attrs at register, the broker puts them on the host identity,
and only pre-!29 identities (env-qa-02's) were hand-added.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01AW3QqEpwLV69KHn24Re45Q

docs/PROTOCOL.md

@@ -15,11 +15,10 @@ The agent side of the backend lifecycle agent protocol — [MONKY-ADR-0028](http
   `state/overlay/configs.json` — the authority for the port); the sidecar's `host.v1` forwards to
   `127.0.0.1:8081` inside the pod. `tenancy.port` in the config, `install.sh` and the ansible role all
   default to 443 (0.1.5). Only host identities carrying `#monky-deploy-agent` may dial
-  (`monky.tenancy.deploy.dial`, openziti). Adding that attr (and `#openbao-client`) to
-  `monky-host.<env>` at kit reveal is the ADR-0028 addendum and is **not implemented in monky-ziti
-  yet** (its host template `app/fabric.py` `host_identity_attrs` does not carry it; openziti
-  `docs/services.md` §Platform services records when it does) — until then an operator adds both
-  attrs on the controller by hand after enrolment.
+  (`monky.tenancy.deploy.dial`, openziti). Tenancy sends that attr and `#openbao-client` to the
+  broker as `host_extra_attrs` when it registers an agent-backed backend (monky-tenancy !29,
+  monky-ziti `ac258352` — both 2026-09-07), so `monky-host.<env>` carries them from creation;
+  identities created before that (env-qa-02's) had them added on the controller by hand.
 - **Transport:** plain HTTP inside the mesh (`transport: sdk` dials by service name;
   `proxy` → `127.0.0.1:18443`). OpenBao is the existing `openbao` ziti service (`#openbao-client`),
   dialled as `https://bao.cbs.tikali.net:8200` (an intercept name), TLS validated against the