Aggiunge replay YouTube temporaneo, pull registrazioni dai CPX e snapshot ingest in admin.

Così overflow Hetzner e VOD YouTube restano in archivio dopo lo spegnimento del nodo, e la colonna ingest non si svuota.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/spec/requests/admin/sessions_spec.rb

@@ -60,4 +60,31 @@ RSpec.describe "Admin sessions index", type: :request do
     expect(response.body).to include("Dettaglio sessione").or include("Session details")
     expect(response.body).to include(session_a.id)
   end
+
+  it "mostra lo snapshot ingest anche se il nodo è stato decommissionato" do
+    node = StreamNode.create!(
+      slug: "ingest-09",
+      hostname: "ingest-09.mltv-stream.net",
+      role: "cloud",
+      status: "ready",
+      provider: "hetzner",
+      rtmp_base_url: "rtmp://ingest-09.mltv-stream.net:1935",
+      hls_base_url: "https://collaudo.example/hls",
+      api_base_url: "http://10.0.0.9:9997",
+      max_publishers: 4,
+      max_relays: 4
+    )
+    session_a.update!(stream_node: node)
+    node.destroy!
+    session_a.reload
+
+    get admin_sessions_path
+    expect(response).to have_http_status(:ok)
+    expect(response.body).to include("ingest-09")
+    expect(response.body).to include("Hetzner")
+
+    get admin_session_path(session_a)
+    expect(response.body).to include("ingest-09")
+    expect(response.body).to include("nodo rimosso").or include("node removed")
+  end
 end