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/app/models/team.rb

@@ -1,19 +1,39 @@
 class Team < ApplicationRecord
+  include Brandable
+
+  belongs_to :club
   has_many :user_teams, dependent: :destroy
   has_many :users, through: :user_teams
   has_many :matches, dependent: :destroy
   has_one :youtube_credential, dependent: :destroy
-  has_one :subscription, dependent: :destroy
   has_many :recordings, dependent: :destroy
   has_many :team_invitations, dependent: :destroy
 
   validates :name, presence: true
 
+  def subscription
+    club.subscription
+  end
+
   def entitlements
-    @entitlements ||= Teams::Entitlements.new(self)
+    Teams::Entitlements.new(self)
   end
 
   def owner
-    user_teams.find_by(role: "owner")&.user
+    club&.owner
+  end
+
+  private
+
+  def branding_parent
+    club
+  end
+
+  def default_primary_color
+    club&.primary_color.presence || super
+  end
+
+  def default_secondary_color
+    club&.secondary_color.presence || super
   end
 end