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/controllers/api/v1/youtube_controller.rb

@@ -2,14 +2,14 @@ module Api
   module V1
     class YoutubeController < BaseController
       def authorize
-        team = current_user.teams.find(params[:team_id])
+        team = current_user.manageable_teams.find(params[:team_id])
         team.entitlements.assert_can_connect_youtube!
         url = Youtube::OauthUrl.build(team_id: team.id, redirect_uri: ENV.fetch("YOUTUBE_REDIRECT_URI"))
         render json: { authorization_url: url }
       end
 
       def callback
-        team = current_user.teams.find(params[:state])
+        team = current_user.manageable_teams.find(params[:state])
         tokens = Youtube::OauthExchange.call(params[:code])
         cred = team.youtube_credential || team.build_youtube_credential
         cred.update!(