Read this and specifically the "Also be patient" part.
It's fine to answer on your own thread after 2 or 3 days (not including weekends) if you don't have an answer.
We are not all guys fortunately. I think that Hi! is perfectly enough 
Not really. You can consider different options:
Use a technical temporary table of deleted items. Read that table and delete every document which is referenced in it.
Use a trigger
Modify the application layer (the service layer) and do that in real time. That's my preferred way.
I shared most of my thoughts there: https://david.pilato.fr/blog/2015-05-09-advanced-search-for-your-legacy-application/