tripit: Gmail ingest (12-month) + vbarzin owner + plans@ forward-to-parse

Reconciles the tripit stack source with live state and adds the forward
flow. Ingest now polls vbarzin@gmail.com [Gmail]/All Mail read-only over a
rolling 12-month X-GM-RAW travel-sender window (Croatia Jet2 refs excluded),
filing trips under MAIL_DEFAULT_OWNER_EMAIL=vbarzin@gmail.com (Viktor's
Authentik login identity). Adds an ingest-plans CronJob that polls spam@
filtered to To:plans@viktorbarzin.me (the @viktorbarzin.me catch-all target)
so forwarded bookings are extracted and attached to the matching trip;
IMAP_PASSWORD is overridden per-job to spam@'s creds (PLANS_IMAP_PASSWORD).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.claude/CLAUDE.md

@@ -168,6 +168,7 @@ Repo IDs: infra=1, Website=2, finance=3, health=4, travel_blog=5, webhook-handle
 - **External monitoring**: `[External] <service>` monitors in Uptime Kuma test full external path (DNS → Cloudflare → Tunnel → Traefik). Divergence metric `external_internal_divergence_count` → alert `ExternalAccessDivergence` (15min). Config: `stacks/uptime-kuma/`, targets from `cloudflare_proxied_names` in `config.tfvars` (17 remaining centrally-managed hostnames; most DNS records now auto-created by `ingress_factory` `dns_type` param).
 - Key alerts: OOMKill, pod replica mismatch, 4xx/5xx error rates, UPS battery, CPU temp, SSD writes, NFS responsiveness, ClusterMemoryRequestsHigh (>85%), ContainerNearOOM (>85% limit), PodUnschedulable, ExternalAccessDivergence.
 - **E2E email monitoring**: CronJob `email-roundtrip-monitor` (every 20 min) sends test email via Brevo HTTP API to `smoke-test@viktorbarzin.me` (catch-all → `spam@`), verifies IMAP delivery, deletes test email, pushes metrics to Pushgateway + Uptime Kuma. Alerts: `EmailRoundtripFailing` (60m), `EmailRoundtripStale` (60m), `EmailRoundtripNeverRun` (60m). Outbound relay: Brevo EU (`smtp-relay.brevo.com:587`, 300/day free — migrated from Mailgun). Inbound external traffic enters via pfSense HAProxy on `10.0.20.1:{25,465,587,993}`, which forwards to k8s `mailserver-proxy` NodePort (30125-30128) with `send-proxy-v2`. Mailserver pod runs alt PROXY-speaking listeners (2525/4465/5587/10993) alongside stock PROXY-free ones (25/465/587/993) for intra-cluster clients. Real client IPs recovered from PROXY v2 header despite kube-proxy SNAT (replaces pre-2026-04-19 MetalLB `10.0.20.202` ETP:Local scheme; see bd code-yiu + `docs/runbooks/mailserver-pfsense-haproxy.md`). Vault: `brevo_api_key` in `secret/viktor` (probe + relay).
+- **Authentik walling-off guard**: `blackbox-exporter` (monitoring ns, `stacks/monitoring/modules/monitoring/authentik_walloff_probe.tf`) probes each must-stay-public `auth = "none"` carve-out URL with `no_follow_redirects` and FAILS (`fail_if_header_matches` on `Location`) iff it 302s to Authentik. Catches a carve-out regressing (TF revert / deploy / `ingress_factory` `auth` default flipping back to `"required"`). Scrape job `blackbox-authentik-walloff` (1m) → alert `AuthentikWallingOffPublicPath` (`probe_failed_due_to_regex == 1`, for 10m, `lane=security` → `#security` Slack). **To guard a new carve-out: add one line to `local.authentik_walloff_targets`** (a `service → URL` map; `valid_status_codes` includes 301/302 so legit redirects/404s stay green — only the Authentik `Location` fails the probe). `curl -sI '<url>'` must NOT show a Location to `authentik.viktorbarzin.me` before adding.
 
 ## Security Posture (Wave 1 — locked 2026-05-18)