Replace legacy jellyfin app with fafflix (adult, cheeztv pattern)

Rebuild the adult media instance as 'fafflix' following the same HA pattern
as the kids instance (cheeztv): Postgres-backed jellyfin-ha fork, Valkey
transcode-lease store, shared-RWX transcode, CNPG + k8up/restic backups,
static CephFS media PVs.

- Add apps/base/fafflix (namespace/labels/secrets/buckets/Vault path fafflix-*)
- fafflix mounts the shared movies/tv subvolumes' adult subtree at
  /media/{movies,tv} plus the kids subtree at /media/{movies,tv}-kids so it can
  resume kids content started on cheeztv; new unique static PV volumeHandles
- Keep serving the legacy hostname jellyfin.k8s.syd1.au.unkin.net (fafflix-tls);
  dedicated fafflix domain deferred, no new public host
- config PVC on cephfs-raid5-delete
- Remove apps/base/jellyfin + overlay; swap jellyfin->fafflix in the media
  ApplicationSet glob and AppProject namespace destination
- No data currently on the adult instance, so the wipe/replace is sanctioned

apps/base/fafflix/vmpodscrape.yaml

@@ -0,0 +1,19 @@
+---
+# Scrape the operator-injected redis_exporter sidecar (:9121, port name
+# `metrics`) on the fafflix-valkey ValkeyNode pods. The valkey-operator gives
+# its pods fixed labels only (no pod-label passthrough on the ValkeyCluster CR),
+# so select on the operator-managed labels. Picked up by the observability
+# VMAgent (selectAllByDefault).
+apiVersion: operator.victoriametrics.com/v1beta1
+kind: VMPodScrape
+metadata:
+  name: valkey-exporter
+  namespace: fafflix
+spec:
+  selector:
+    matchLabels:
+      app.kubernetes.io/managed-by: valkey-operator
+      app.kubernetes.io/component: valkey-node
+  podMetricsEndpoints:
+    - port: metrics
+      path: /metrics