debug: temporarily route Jellyfin ingress through header-capture proxy

Adds a transparent nginx passthrough that logs auth-related request
headers (Authorization, X-Emby-Authorization, X-Emby-Token,
X-MediaBrowser-Token, User-Agent) to diagnose why the Filebar iOS app
gets 400s on /Users/AuthenticateByName against Jellyfin 12.0. All
traffic still reaches the real jellyfin Service unchanged. Revert the
Ingress backend and remove jellyfin-header-debug.yaml once captured.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016EQrGkfXFae4PZG9QfPRf4

manifests/media/jellyfin-header-debug.yaml

@@ -0,0 +1,82 @@
+# Apply: kubectl apply -f manifests/media/jellyfin-header-debug.yaml
+# Delete: kubectl delete -f manifests/media/jellyfin-header-debug.yaml
+# Description: TEMPORARY diagnostic proxy that transparently forwards to the
+# real jellyfin Service while logging auth-related request headers to stdout.
+# Used to capture what the Filebar iOS app sends on /Users/AuthenticateByName
+# so we can see why Jellyfin 12.0 rejects it. Swap the jellyfin Ingress
+# backend to jellyfin-debug-proxy to route traffic through this, capture
+# logs, then swap back and delete this file/PR once done -- not meant to
+# stay in the cluster long-term.
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: jellyfin-debug-proxy-conf
+  namespace: jellyfin
+data:
+  default.conf: |
+    map $http_upgrade $connection_upgrade {
+      default upgrade;
+      ''      close;
+    }
+    log_format jf_debug '$time_iso8601 client=$remote_addr method=$request_method uri="$request_uri" '
+                         'status=$status '
+                         'user_agent="$http_user_agent" '
+                         'authorization="$http_authorization" '
+                         'x_emby_authorization="$http_x_emby_authorization" '
+                         'x_emby_token="$http_x_emby_token" '
+                         'x_mediabrowser_token="$http_x_mediabrowser_token"';
+    server {
+      listen 8080;
+      access_log /dev/stdout jf_debug;
+      location / {
+        proxy_pass http://jellyfin.jellyfin.svc.cluster.local:80;
+        proxy_http_version 1.1;
+        proxy_set_header Host $host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_set_header Upgrade $http_upgrade;
+        proxy_set_header Connection $connection_upgrade;
+        proxy_read_timeout 3600s;
+      }
+    }
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: jellyfin-debug-proxy
+  namespace: jellyfin
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: jellyfin-debug-proxy
+  template:
+    metadata:
+      labels:
+        app: jellyfin-debug-proxy
+    spec:
+      containers:
+        - name: nginx
+          image: nginx:1.27-alpine
+          ports:
+            - containerPort: 8080
+          volumeMounts:
+            - name: conf
+              mountPath: /etc/nginx/conf.d
+      volumes:
+        - name: conf
+          configMap:
+            name: jellyfin-debug-proxy-conf
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: jellyfin-debug-proxy
+  namespace: jellyfin
+spec:
+  selector:
+    app: jellyfin-debug-proxy
+  ports:
+    - port: 80
+      targetPort: 8080

manifests/media/jellyfin.yaml

@@ -169,6 +169,9 @@ spec:
             pathType: Prefix
             backend:
               service:
-                name: jellyfin
+                # TEMPORARY: routed through jellyfin-debug-proxy (see
+                # jellyfin-header-debug.yaml) to capture auth headers from
+                # the Filebar app. Revert to `jellyfin` once done.
+                name: jellyfin-debug-proxy
                 port:
                   number: 80