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/event.rb

@@ -30,6 +30,7 @@ class Event < ApplicationRecord
   has_many :tickets, through: :ticket_types
   has_many :orders
   has_many :earnings, dependent: :destroy
+  has_many :payouts, dependent: :destroy
 
   # === Callbacks ===
   before_validation :geocode_address, if: :should_geocode_address?
@@ -73,6 +74,7 @@ class Event < ApplicationRecord
   end
 
   def total_earnings_cents
+    # Only count earnings from non-refunded tickets
     earnings.pending.sum(:amount_cents)
   end