Chore: Fix Deserialisation Error in Jobs (#1683)

- Ignore Jobs on de-serialization error
- Show empty conversations in chat UI
Fixes: #1480

app/views/api/v1/conversations/partials/_conversation.json.jbuilder

@@ -11,7 +11,9 @@ json.meta do
 end
 
 json.id conversation.display_id
-if conversation.unread_incoming_messages.count.zero?
+if conversation.messages.count.zero?
+  json.messages []
+elsif conversation.unread_incoming_messages.count.zero?
   json.messages [conversation.messages.includes([{ attachments: [{ file_attachment: [:blob] }] }]).last.try(:push_event_data)]
 else
   json.messages conversation.unread_messages.includes([:user, { attachments: [{ file_attachment: [:blob] }] }]).last(10).map(&:push_event_data)