chore: Disable fetching new emails after mailbox error (#4176)

- Disabled email fetch job if credentials for the channel isn't working
- notify customers when the email channel isn't working

fixes: https://github.com/chatwoot/chatwoot/issues/4174

app/models/channel/email.rb

@@ -34,6 +34,7 @@
 
 class Channel::Email < ApplicationRecord
   include Channelable
+  include Reauthorizable
 
   self.table_name = 'channel_email'
   EDITABLE_ATTRS = [:email, :imap_enabled, :imap_email, :imap_password, :imap_address, :imap_port, :imap_enable_ssl, :imap_inbox_synced_at,

app/models/concerns/reauthorizable.rb

@@ -39,10 +39,11 @@ module Reauthorizable
 
     if (is_a? Integrations::Hook) && slack?
       AdministratorNotifications::ChannelNotificationsMailer.with(account: account).slack_disconnect.deliver_later
+    elsif is_a? Channel::FacebookPage
+      AdministratorNotifications::ChannelNotificationsMailer.with(account: account).facebook_disconnect(inbox).deliver_later
+    elsif is_a? Channel::Email
+      AdministratorNotifications::ChannelNotificationsMailer.with(account: account).email_disconnect(inbox).deliver_later
     end
-    return unless is_a? Channel::FacebookPage
-
-    AdministratorNotifications::ChannelNotificationsMailer.with(account: account).facebook_disconnect(inbox).deliver_later
   end
 
   # call this after you successfully Reauthorized the object in UI