Introduce worker.bstein.dev as the canonical hostname for the owner-only
Hermes coordinator, previously agent.hermes.bstein.dev.
The old host is deliberately kept alive. CoreDNS, both agent Ingresses and
the hermes-sites certificate now serve BOTH names, so merging this cannot
take away the endpoint the operator uses to reach the coordinator. Retiring
agent.hermes.bstein.dev is a separate, separately scheduled change. No
redirect middleware is added.
What switches to the new host:
- HERMES_DASHBOARD_PUBLIC_URL and the oauth2-proxy --redirect-url
- the Keycloak hermes-agent-proxy rootUrl
- operator docs, skills, the ZAP baseline target and the triage monitor default
What stays dual-homed until retirement:
- CoreDNS hosts entry, both agent Ingress rules, certificate SANs
- API_SERVER_CORS_ORIGINS (now a comma-separated pair)
- the Keycloak redirect URIs, web origins and post-logout origins, so a
rollback only needs the oauth2-proxy --redirect-url reverted and does not
require re-running the ensure job
ensure_proxy_client now takes optional trailing legacy URLs; called with a
single URL it emits the identical payload as before, so the chat and triage
clients are unaffected. The ensure Job is bumped to -11 so Flux re-runs it;
login on the new host fails until that Job completes.
Because the session and CSRF cookies use the __Host- prefix they are bound to
one origin, so a fresh login must start on worker.bstein.dev and existing
sessions do not carry over -- re-login is required after rollout.
Knowledge catalogs and diagrams regenerated with `make knowledge`.
