feat: Implement payment retry system and draft ticket expiry management

- Add 30-minute expiry window for draft tickets with automatic cleanup
- Implement 3-attempt payment retry mechanism with tracking
- Create background job for cleaning expired draft tickets every 10 minutes
- Add comprehensive UI warnings for expiring tickets and retry attempts
- Enhance dashboard to display pending draft tickets with retry options
- Add payment cancellation handling with smart retry redirections
- Include rake tasks for manual cleanup and statistics
- Add database fields: expires_at, payment_attempts, last_payment_attempt_at, stripe_session_id
- Fix payment attempt counter display to show correct attempt number (1/3, 2/3, 3/3)

db/migrate/20250823171354_create_tickets.rb

@@ -9,6 +9,14 @@ class CreateTickets < ActiveRecord::Migration[8.0]
       t.string :first_name
       t.string :last_name
 
+      # Implemented to "temporize" tickets
+      # If a ticket is not paid in time, it is removed from the database
+      #
+      t.string :stripe_session_id
+      t.timestamp :expires_at
+      t.integer :payment_attempts, default: 0
+      t.timestamp :last_payment_attempt_at
+
       t.references :user, null: true, foreign_key: false
       t.references :ticket_type, null: false, foreign_key: false
 
@@ -22,5 +30,9 @@ class CreateTickets < ActiveRecord::Migration[8.0]
     # Add indexes for better performance
     # add_index :tickets, :first_name unless index_exists?(:tickets, :first_name)
     # add_index :tickets, :last_name unless index_exists?(:tickets, :last_name)
+    #
+    # add_index :tickets, :stripe_session_id, unique: true
+    # add_index :tickets, [ :status, :expires_at ]
+    # add_index :tickets, [ :user_id, :status ]
   end
 end