Club come entità principale, branding e fix infrastruttura streaming.

Introduce clubs con abbonamento, branding Active Storage e flusso registrazione società; corregge healthcheck MediaMTX (immagine distroless) e allinea dominio produzione matchlivetv.it.

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

backend/spec/services/teams/entitlements_spec.rb

@@ -1,11 +1,12 @@
 require "rails_helper"
 
 RSpec.describe Teams::Entitlements do
-  let(:team) { Team.create!(name: "Test Team", sport: "volleyball") }
+  let(:club) { Club.create!(name: "Test Club", sport: "volleyball", primary_color: "#e53935", secondary_color: "#ffffff") }
+  let(:team) { club.teams.create!(name: "Test Team", sport: "volleyball") }
 
   before do
     load Rails.root.join("db/seeds/plans.rb")
-    Billing::AssignPlan.call(team: team, plan_slug: "free")
+    Billing::AssignPlan.call(club: club, plan_slug: "free")
   end
 
   subject(:ent) { described_class.new(team) }
@@ -19,7 +20,7 @@ RSpec.describe Teams::Entitlements do
   end
 
   it "allows youtube on premium full" do
-    Billing::AssignPlan.call(team: team, plan_slug: "premium_full")
+    Billing::AssignPlan.call(club: club, plan_slug: "premium_full")
     expect(ent.can_stream_on?("youtube")).to be true
   end