feat: Implement promoter payout system for event revenue processing

- Add Payout model with associations to User and Event
- Create payout requests for completed events with proper earnings calculation
- Exclude refunded tickets from payout calculations
- Add promoter dashboard views for managing payouts
- Implement admin interface for processing payouts
- Integrate with Stripe for actual payment processing
- Add comprehensive tests for payout functionality

Co-authored-by: Qwen-Coder <qwen-coder@alibabacloud.com>

app/models/order.rb

@@ -160,22 +160,9 @@ class Order < ApplicationRecord
     self.expires_at = DRAFT_EXPIRY_TIME.from_now if expires_at.blank?
   end
 
-def draft?
-  status == "draft"
-end
-
-def create_earnings_if_paid
-  return unless event.present? && user.present?
-  return if event.earnings.exists?(order_id: id)
-
-  event.earnings.create!(
-    user: user,
-    order: self,
-    amount_cents: promoter_payout_cents,
-    fee_cents: platform_fee_cents,
-    status: :pending
-  )
-end
+  def draft?
+    status == "draft"
+  end
 
   def create_earnings_if_paid
     return unless event.present? && user.present?