DIG Sandpaper workflow

[saggu]

We need to make following changes to the sandpaper, a query is sent to sandpaper with a text or phrase.

• Sandpaper should call Lukas box and get k document ids with similarity scores
• Alter the ES query: add k doc ids to the query, fetch the documents and return the results to DIG UI
• If there are facets selected in the query, add filters to the previous query, fetch and return documents to DIG UI

[saggu]

Right now, sandpaper is able to call a webservice to get similar docs. ToDo: find out how to call it as a procedure

[saggu]

We are going with webservice at this point.