[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>
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