[infra] Fix rewrite-body plugin + cleanup TrueNAS + version bumps

## Context

The rewrite-body Traefik plugin (packruler/rewrite-body v1.2.0) silently
broke on Traefik v3.6.12 — every service using rybbit analytics or anti-AI
injection returned HTTP 200 with "Error 404: Not Found" body. Root cause:
middleware specs referenced plugin name `rewrite-body` but Traefik registered
it as `traefik-plugin-rewritebody`.

Migrated to maintained fork `the-ccsn/traefik-plugin-rewritebody` v0.1.3
which uses the correct plugin name. Also added `lastModified = true` and
`methods = ["GET"]` to anti-AI middleware to avoid rewriting non-HTML
responses.

## This change

- Replace packruler/rewrite-body v1.2.0 with the-ccsn/traefik-plugin-rewritebody v0.1.3
- Fix plugin name in all 3 middleware locations (ingress_factory, reverse-proxy factory, traefik anti-AI)
- Remove deprecated TrueNAS cloud sync monitor (VM decommissioned 2026-04-13)
- Remove CloudSyncStale/CloudSyncFailing/CloudSyncNeverRun alerts
- Fix PrometheusBackupNeverRun alert (for: 48h → 32d to match monthly sidecar schedule)
- Bump versions: rybbit v1.0.21→v1.1.0, wealthfolio v1.1.0→v3.2,
  networking-toolbox 1.1.1→1.6.0, cyberchef v10.24.0→v9.55.0
- MySQL standalone storage_limit 30Gi → 50Gi
- beads-server: fix Dolt workbench type casing, remove Authentik on GraphQL endpoint

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

stacks/traefik/modules/traefik/middleware.tf

@@ -380,13 +380,15 @@ resource "kubernetes_manifest" "middleware_anti_ai_trap_links" {
     }
     spec = {
       plugin = {
-        rewrite-body = {
+        traefik-plugin-rewritebody = {
+          lastModified = true
           rewrites = [{
             regex       = "</body>"
             replacement = "<div style=\"position:absolute;left:-9999px;height:0;overflow:hidden\" aria-hidden=\"true\"><a href=\"https://poison.viktorbarzin.me/article/training-data-2024-research-corpus\">Research Archive</a><a href=\"https://poison.viktorbarzin.me/article/dataset-export-machine-learning-v3\">Dataset Export</a><a href=\"https://poison.viktorbarzin.me/article/nlp-benchmark-evaluation-results\">Benchmark Results</a><a href=\"https://poison.viktorbarzin.me/article/web-crawl-index-2024-archive\">Web Index</a><a href=\"https://poison.viktorbarzin.me/article/text-corpus-english-dump\">Text Corpus</a></div></body>"
           }]
           monitoring = {
-            types = ["text/html"]
+            types   = ["text/html"]
+            methods = ["GET"]
           }
         }
       }