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)

app/jobs/cleanup_expired_drafts_job.rb

@@ -0,0 +1,15 @@
+class CleanupExpiredDraftsJob < ApplicationJob
+  queue_as :default
+
+  def perform
+    expired_count = 0
+    
+    Ticket.expired_drafts.find_each do |ticket|
+      Rails.logger.info "Expiring draft ticket #{ticket.id} for user #{ticket.user_id}"
+      ticket.expire_if_overdue!
+      expired_count += 1
+    end
+
+    Rails.logger.info "Expired #{expired_count} draft tickets" if expired_count > 0
+  end
+end