fix: Update auto reply and hide reply time for email inbox (#3985)

Co-authored-by: Pranav Raj S <pranav@chatwoot.com>

app/workers/email_reply_worker.rb

@@ -5,8 +5,7 @@ class EmailReplyWorker
   def perform(message_id)
     message = Message.find(message_id)
 
-    return unless message.outgoing? || message.input_csat?
-    return if message.private?
+    return unless message.email_notifiable_message?
 
     # send the email
     ConversationReplyMailer.with(account: message.account).email_reply(message).deliver_later