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/valkey.yaml

@@ -0,0 +1,47 @@
+---
+# HA Valkey managed by valkey-operator as Jellyfin's distributed transcode-session
+# store. shards:1 + replicas:2 is one primary with two replicas in a single shard
+# group (three ValkeyNodes total): losing the primary triggers an automatic
+# failover to a replica, so a node/pod loss no longer drops the shared transcode
+# lease state the two Jellyfin replicas coordinate through. The operator always
+# runs Valkey cluster-mode-enabled with protected-mode off and leaves the built-in
+# `default` user passwordless, so clients connect with no auth/TLS (parity with the
+# old open redis); StackExchange.Redis seeds off the single headless service and
+# auto-discovers the topology plus failovers, so the connection string is
+# unchanged. scheduling.node.spread.shard:Required renders pod anti-affinity that
+# keeps the three nodes on distinct hosts (kubernetes.io/hostname), so one host
+# loss removes at most one node. podDisruptionBudget.mode:Cluster lets the operator
+# manage a quorum-aware PDB. Persistence stays omitted so /data is an emptyDir:
+# lease state is ephemeral (30s TTLs), replication+failover already provide
+# redundancy and a replaced node re-syncs from the primary, and an operator-managed
+# PVC cannot carry the k8up.io/backup:"false" annotation the namespace's
+# cluster-wide k8up Schedule needs to skip in-use RWO volumes.
+apiVersion: valkey.io/v1alpha1
+kind: ValkeyCluster
+metadata:
+  name: fafflix-valkey
+  namespace: fafflix
+spec:
+  shards: 1
+  replicas: 2
+  image: docker.io/valkey/valkey:9.0.0
+  # redis_exporter sidecar (:9121, port name `metrics`) on every ValkeyNode pod;
+  # the operator manages a dedicated _exporter ACL user for it. Image version
+  # pinned; scraped by valkey-exporter VMPodScrape in vmpodscrape.yaml.
+  exporter:
+    enabled: true
+    image: docker.io/oliver006/redis_exporter:v1.89.0
+  scheduling:
+    node:
+      spread:
+        shard:
+          mode: Required
+  podDisruptionBudget:
+    mode: Cluster
+  resources:
+    requests:
+      cpu: 50m
+      memory: 128Mi
+    limits:
+      cpu: 500m
+      memory: 512Mi