Fix Audited::Audit constant error for Rails 7 compatibility

- Add explicit require for 'audited/audit' to ensure proper load order
- Change VulcanAudit to inherit from Audited::Audit directly
- This fixes the 'uninitialized constant Audited::Audit' error in Rails 7
- The issue was caused by load order - the audit class needs to be loaded before inheritance

Co-Authored-By: Aaron Lippold <[email protected]>

Author: aaronlippold

app/lib/vulcan_audit.rb

@@ -1,5 +1,7 @@
 # frozen_string_literal: true
 
+require 'audited/audit'
+
 # Custom Audited class for Vulcan-specific methods for interacting with audits.
 class VulcanAudit < Audited::Audit
   belongs_to :audited_user, class_name: 'User', optional: true