docs: clarify felhom-wipe.sh full level preserves infra containers

'full' was ambiguously described as 'Controller + felhom-data/' making
it sound like the controller container is removed. Clarified that 'full'
runs controller-level cleanup (app containers only) and infra containers
(felhom-controller, traefik, etc.) are preserved throughout.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

CHANGELOG.md

@@ -32,7 +32,7 @@ All felhom-managed data on external drives now lives under a `felhom-data/` subd
 - **`scripts/felhom-wipe.sh`** — Test node cleanup script with 4 wipe levels:
   - `soft` — Removes controller state files (settings.json, metrics.db, session/setup/update/snapshot state)
   - `controller` — Soft + removes all app containers, volumes, and stack directories (skips protected stacks by default)
-  - `full` — Controller + removes `felhom-data/` on all storage drives (also removes old-style `appdata/` and `backups/` for migration compatibility); restarts controller
+  - `full` — `controller`-level cleanup + removes `felhom-data/` on all storage drives (also removes old-style `appdata/` and `backups/` for migration compatibility); infra containers preserved, controller restarted after cleanup
   - `nuclear` — Full + removes controller.yaml, all infrastructure containers (controller, traefik, cloudflared, portainer), DR markers, and runs `docker system prune -af --volumes`
   - Auto-detects paths from `controller.yaml` and `settings.json`
   - Dry-run by default; requires `--yes` to execute