fix(authentik): long-lived social-login sessions + shield auth from CrowdSec lockout

Viktor's passkeys all vanished and he was suddenly being asked to log in
multiple times a day instead of ~monthly. Root cause: on 2026-06-18 an ad-hoc
tripit passkey E2E test (run from the devvm as akadmin via python-httpx) cleaned
up "the demo user's" passkeys with GET /core/users/?search={demo} then DELETE
each device of users[0] — but the fuzzy search returned the REAL account, so it
wiped all 6 real passkeys. Losing passkeys forced fallback to Google login, and
the social-login stage (default-source-authentication-login) had the provider
default session_duration=seconds=0, which falls back to UNAUTHENTICATED_AGE=2h —
hence the constant re-logins. (Password + passkey logins were already weeks=4.)

Changes:
- authentik: adopt default-source-authentication-login into Terraform (import)
  and pin session_duration=weeks=4, so Google/GitHub/Facebook logins last as long
  as password/passkey. Immediate relief without re-enrolling.
- authentik: document the provider-schema gotcha — authentik_stage_identification
  exposes no webauthn_stage / enable_remember_me attribute, so they must NOT be in
  ignore_changes (commit 4e882989 removed them for this reason; re-adding breaks
  every apply). The passkey break was purely the missing device records, not drift.
- edge (rybbit): shield auth so a CrowdSec hit can never wall a user out of login —
  carve authentik.viktorbarzin.me + public-auth out of the zone WAF block rule,
  make the LAPI->edge sync ban-only (stop downgrading captcha to a hard block),
  and set exclude_crowdsec on the Authentik UI ingress (auth keeps rate-limiting).
- docs: record the session-duration change, the edge enforcement + auth carve-out
  (previously undocumented), and the pre-existing broken crowdsec-cf-sync CronJob
  (CF cursor pagination 400 + ~31k IPs vs list capacity -> edge list inert).

Passkey re-enrollment is a manual user action (devices are gone from the DB);
nothing auto-re-deletes them.

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

stacks/authentik/modules/authentik/main.tf

@@ -82,6 +82,13 @@ module "ingress" {
   service_name     = "goauthentik-server"
   tls_secret_name  = var.tls_secret_name
   anti_ai_scraping = false
+  # Never let the in-cluster CrowdSec bouncer serve a Turnstile/captcha
+  # interstitial or 403 on Authentik's own login + WebAuthn XHR endpoints — that
+  # walls users out of the very gate they authenticate through (a CrowdSec hit
+  # would break the passkey ceremony / session refresh mid-flow). Auth keeps
+  # Traefik rate-limiting; the Cloudflare edge WAF also carves out this host
+  # (stacks/rybbit/crowdsec_edge.tf). 2026-06-20.
+  exclude_crowdsec = true
   extra_annotations = {
     "gethomepage.dev/enabled"      = "true"
     "gethomepage.dev/name"         = "Authentik"