feat(k8s/jellyfin): add Jellyfin stack (deployment scaled to 0 for data migration)

Jellyfin media server with Intel GPU hardware transcoding, NFS media
volume, and UDP discovery/DLNA ports. OIDC auth handled internally
by Jellyfin (no Authelia middleware on ingress).

kubernetes/app/jellyfin/ingress.yaml

@@ -0,0 +1,24 @@
+---
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: jellyfin
+  namespace: jellyfin
+  annotations:
+    cert-manager.io/cluster-issuer: letsencrypt
+spec:
+  tls:
+    - hosts:
+        - ${JELLYFIN_HOST}
+      secretName: jellyfin-tls
+  rules:
+    - host: ${JELLYFIN_HOST}
+      http:
+        paths:
+          - path: /
+            pathType: Prefix
+            backend:
+              service:
+                name: jellyfin
+                port:
+                  number: 8096