Implements requirement 029: web-app-checkmk deploying checkmk/check-mk-raw
2.4.0p32 (Raw/Community) behind sys-svc-proxy. No native OIDC, so SSO uses the
platform oauth2-proxy gate + Checkmk header-auth (auth_by_http_header =
X-Remote-User, injected by the role proxy.conf.j2 from $authrequest_username =
Keycloak preferred_username), plus a native LDAP connection for user records.
No external DB. Agent receiver (8000) host-port mapped via a new
PORT_BANDS.local.agent band.
Auth/LDAP/proxy mechanisms source-verified against Checkmk v2.4.0p32
(cmk/gui/auth.py, userdb/ldap_connector.py, userdb/_connections.py) and the
infinito sso_proxy nginx chain: fixed the LDAP file path (user_connections.mk)
and directory_type ("openldap"). LDAP sync timing and classic-GUI Playwright
selectors remain live-deploy-validation items (env-blocked).
Validation: make autoformat clean; make test green (lint, test-lint, test-unit,
test-integration 190, test-external).
Refs: docs/requirements/029-web-app-checkmk.md
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>