docs: fix pre-existing broken links surfaced by docs-lint

Problem: docs-lint (added in the wiki-hq reorg) surfaced 126 broken relative
links that predated this session — a container rename, incident/plan docs
that moved into archive/done subfolders without their inbound links being
updated, and a handful of relative-depth bugs in files nested under
containers/archive/ and plans/done/.

Fixes applied, by category:
- 124-authentik.md -> 106-auth-outpost.md (container was renamed; ~40 refs).
- investigations/{2026-04-21-hubris-crash-loop,2026-05-31-authentik-vps-migration}.md
  -> archive/ prefix (both moved to investigations/archive/ previously).
- plans/{2026-06-01-slate-ax-to-sodola-migration,2026-06-04_130000-deprecate-claudio-bot,
  2026-06-25-yuvomi-deployment}.md -> plans/done/ prefix.
- Depth bugs in files nested one level deeper than their siblings assumed
  (investigations/archive/*, knowledge/wiki/containers/archive/*,
  plans/done/*) — corrected relative-path depth.
- Destroyed containers with no surviving page (126-plato) delinked to the
  containers/index.md archaeology row instead of a 404.
- ludo-mini.yaml -> strong.yaml (host was renamed, same physical machine).
- netbird-vps.md (no narrative page exists) -> netbird-vps.yaml (substrate
  record, matching the existing convention for hosts without a wiki page).
- runbook-dpkg-interrupted.md refs -> .agents/skills/runbook-dpkg-interrupted/SKILL.md
  (missed in the phase-4 runbook move because the referencing files used a
  bare filename, not a runbooks/ prefix).
- One dangling forward-reference to a never-written investigation delinked
  to the actual incident record it was describing.

Left alone: two links in knowledge/wiki/containers/101-jellyfin.md into
devops/homelab-authentik-admin/ — an intentional reference to a sibling repo,
not present in this checkout.

Verification: broken-link count 126 -> 2 (real remainder is the cross-repo
reference above); gen-topology.py --check still exit 0; build_host_files.py
still idempotent; all inventory.yaml doc_page targets still resolve.

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

knowledge/wiki/containers/103-paperless.md

@@ -18,7 +18,7 @@ Paperless-ngx for document management. Ingests scans / PDFs from `/mnt/library/d
 | paperless-task-queue, paperless-scheduler, paperless-consumer | — | systemd workers |
 
 ## Auth
-Behind [Authentik forward-auth](124-authentik.md). API path `/api/*` bypasses forward-auth (mobile clients can't follow the browser login redirect; bearer token still enforces auth on `/api`). Header propagation: `PAPERLESS_ENABLE_HTTP_REMOTE_USER=true` and `PAPERLESS_HTTP_REMOTE_USER_HEADER_NAME=HTTP_X_AUTHENTIK_USERNAME` in `/opt/paperless/paperless.conf`. Django auto-creates matching users on first SSO login.
+Behind [Authentik forward-auth](106-auth-outpost.md). API path `/api/*` bypasses forward-auth (mobile clients can't follow the browser login redirect; bearer token still enforces auth on `/api`). Header propagation: `PAPERLESS_ENABLE_HTTP_REMOTE_USER=true` and `PAPERLESS_HTTP_REMOTE_USER_HEADER_NAME=HTTP_X_AUTHENTIK_USERNAME` in `/opt/paperless/paperless.conf`. Django auto-creates matching users on first SSO login.
 
 ## Storage
 - Documents at `/mnt/library/documents` (owner `www-data:www-data`, mode 750 — *not* on the `media` group, by design).
@@ -27,7 +27,7 @@ Behind [Authentik forward-auth](124-authentik.md). API path `/api/*` bypasses fo
 - ~~Disk usage was 86.9% at last legacy monitor reading on 2026-04-21~~ — resolved by growing rootfs to 16 GiB on 2026-05-15.
 
 ## Related
-- [Authentik](124-authentik.md)
+- [Authentik](106-auth-outpost.md)
 - [Caddy](121-caddy.md)
 - [DNS](../infrastructure/dns.md)
 - [Monitoring](../infrastructure/monitoring.md)