feat: Audit Logs for Account User Changes (#7405)

- Audit log for user invitations: https://linear.app/chatwoot/issue/CW-1768/invited-a-user-to-the-account
- Audit log for change role: https://linear.app/chatwoot/issue/CW-1767/name-or-email-changed-the-role-of-the-user-email-to-agent-or-admin
- Audit log for status change: https://linear.app/chatwoot/issue/CW-1766/availability-status-as-events-for-audit-logs


Co-authored-by: Shivam Mishra <scm.mymail@gmail.com>

app/models/account_user.rb

@@ -49,6 +49,15 @@ class AccountUser < ApplicationRecord
     ::Agents::DestroyJob.perform_later(account, user)
   end
 
+  def push_event_data
+    {
+      id: id,
+      availability: availability,
+      role: role,
+      user_id: user_id
+    }
+  end
+
   private
 
   def notify_creation
@@ -63,3 +72,5 @@ class AccountUser < ApplicationRecord
     OnlineStatusTracker.set_status(account.id, user.id, availability)
   end
 end
+
+AccountUser.include_mod_with('Audit::AccountUser')