Add Apple TV signage docs manifest

apps/fc-signage-appletv/README.md

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+# fc-signage-appletv
+
+Apple TV signage is a sealed appliance running the `FlowerCore.Signage.Agent.AppleTv` tvOS app per ADR-134.
+
+This ApplicationSet entry is documentation and inventory metadata only. It intentionally creates no `Deployment`, `Service`, or `Pod`.
+
+The Apple TV app connects outbound to existing FC.Signage.Web surfaces:
+
+- `https://signage.iamworkin.lan/hub/signage` for SignalR live status.
+- `GET /api/v1/nodes/{nodeId}/state` for the 30 second polling fallback.
+- `POST /api/v1/nodes/register` and `POST /api/v1/nodes/{nodeId}/enroll` for pairing and mTLS enrollment.
+- `POST /api/v1/nodes/{nodeId}/heartbeat` for metrics, current content identity, and local audit excerpts.
+
+Distribution is via Apple Developer Enterprise Program or TestFlight plus FC.Distribution / UpdateCenter publishing once Apple credentials are available.

apps/fc-signage-appletv/kustomization.yaml

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+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+  - manifest.yaml

apps/fc-signage-appletv/manifest.yaml

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+# Apple TV signage is a sealed tvOS appliance. This ArgoCD app intentionally
+# carries documentation metadata only; no Deployment, Service, or Pod resources
+# are created for the player.
+---
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: fc-signage-appletv-docs
+  namespace: fc-signage
+  labels:
+    app.kubernetes.io/name: fc-signage-appletv
+    app.kubernetes.io/part-of: flowercore-signage
+    flowercore.io/manifest-kind: docs-only
+data:
+  README: |
+    FlowerCore.Signage.Agent.AppleTv is distributed through Apple Developer
+    Enterprise Program or TestFlight, not Kubernetes.
+
+    The app connects outbound to FC.Signage.Web:
+    - SignalR: https://signage.iamworkin.lan/hub/signage
+    - Polling fallback: GET /api/v1/nodes/{nodeId}/state
+    - Enrollment: POST /api/v1/nodes/{nodeId}/enroll
+    - Heartbeat: POST /api/v1/nodes/{nodeId}/heartbeat
+
+    This placeholder gives ArgoCD and inventory dashboards a first-class
+    Apple TV signage app entry without creating runtime pods.