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/controllers/api/v1/accounts/inboxes_controller.rb

@@ -48,7 +48,10 @@ class Api::V1::Accounts::InboxesController < Api::V1::Accounts::BaseController
     # Inbox update doesn't necessarily need channel attributes
     return if permitted_params(channel_attributes)[:channel].blank?
 
-    validate_email_channel(channel_attributes) if @inbox.inbox_type == 'Email'
+    if @inbox.inbox_type == 'Email'
+      validate_email_channel(channel_attributes)
+      @inbox.channel.reauthorized!
+    end
 
     @inbox.channel.update!(permitted_params(channel_attributes)[:channel])
     update_channel_feature_flags