docs: correct Grafana Authentik SSO facts

The vault claimed the fork property-mapping evaluator was broken and userinfo
returned only sub, so email could never reach Grafana (outcome unverified). That
was a misdiagnosis: the real causes were the NULL authorization_flow (the
NoneType.slug crash) and the email scope mapping returning a bare string rather
than a dict. Record the four verified causes and fixes, point to the repair
script and the new landing spec, and drop the unverified caveat.

serverAppConfigs-docs/Infrastructure/Grafana.md

@@ -4,7 +4,7 @@ description: "Grafana visualizes the metrics that Prometheus collects from every
 tags:
   - infrastructure
   - grafana
-timestamp: 2026-09-11
+timestamp: 2026-10-20
 ---
 
 # Grafana
@@ -64,19 +64,28 @@ Grafana responds on `/api/health` with 200 and `"database":"ok"`; measured 2026-
 - Change the default admin credentials at first boot (env or UI).
 - Dashboards provisioned as code (dashboard JSON plus a YAML provider, `shared/grafana/provisioning/dashboards/`) survive container recreation; UI-created ones live in the data volume — back it up.
 - **Auth = OAuth2 relying-party, not auth_proxy.** The embedded outpost carries
-  no provider token (`token=None`), so no identity header ever reaches Grafana;
-  RP mode is topology-independent. The full verified contract (provider pk 9,
-  client_id `grafana-21ca190cde75d60f`, global authorize/token/userinfo paths,
-  Basic client auth, form-encoded token body, and the fork's userinfo-claims
-  bug that leaves identity at the `sub` hash only) is in
-  [[Authentik Outpost Reference]] → "OAuth2 relying-party quirks". Consequences for Grafana:
-  The unit sets `ALLOW_SIGN_UP=false`, `AUTO_UPSERT=true`, `ALLOW_ASSIGN_ORG=true`
-  `ORG_ID=1` and **no** role-attribute mapping (`grafana.container:52-55`), so
-  users land as Viewer with `login = <sub hex>`; no email/groups/role claims
-  reach Grafana until the evaluator bug is fixed — do not write role mappings
-  that depend on those claims. The local admin account stays the only Admin.
-  (The Viewer-default outcome and the `<sub hex>` login are not readable from
-  the host without the database or an admin password. *(unverified 2026-10-18)*)
+  no provider token (`token=None`), so no identity header reaches Grafana; the
+  login is Grafana's own "Sign in with Authentik" button against the `grafana`
+  confidential-client provider. **Verified end-to-end 2026-10-20** after four
+  independent breakages had made it fail. The two Authentik-side causes (a NULL
+  `authorization_flow` → authorize 500; an email scope mapping that returned a
+  bare string so no `email` claim was emitted) and the full wire contract live in
+  [[Authentik Outpost Reference]] → "OAuth2 relying-party quirks"; the IdP half is
+  re-applied by `scripts/authentik-grafana-sso-fix.sh` (idempotent — re-run after
+  an ak-shell re-creation of the provider or a blueprint import, both of which
+  revert it silently). The Grafana half is the unit's own env (`grafana.container`):
+  `SCOPES="openid email profile"` (a GitLab-style `user:email` scope crashes the
+  authorize view), `USE_ID_TOKEN=true` + no `?api=1` (Grafana v13 otherwise GETs
+  `<api_url>/emails`, which authentik 404s and the login dies with "Login failed:
+  InternalError"), attribute paths `email`/`sub`/`preferred_username`, and
+  `ALLOW_SIGN_UP=true` — safe because the guard fronts every request, so the
+  callback is unreachable to unauthenticated traffic.
+- **What a new login becomes:** a Viewer in org 1 (`ALLOW_ASSIGN_ORG=true`,
+  `ORG_ID=1`, no role-attribute mapping), with `login = <sub hex>` but the real
+  `email`. The local admin account stays the only Admin. The landing that the
+  edge-only 13-sso spec never checked is now asserted by
+  `tests/e2e/specs/20-grafana-sso.spec.ts` (RP round-trip → `/api/user` 200 with
+  an email).
 - **Never point this unit's `EnvironmentFile` at the repo-root `.env`.** That
   file is a gluetun env file and it carries `HOME=/root`; systemd imports it
   for the service, podman then looks for its configuration under `/root`