Search conversations with Postgres full text search (API)

[cheeseblubber]

Is your feature request related to a problem? Please describe.
We want to be able to full text search the backend use https://www.postgresql.org/docs/9.5/textsearch-intro.html for reference.

Describe the solution you'd like
You should be able to search through conversation. Use basic postgres full text search for now.

Describe alternatives you've considered
Potentially investigate elastic search - but postgres full text search is simpler right now without having to introduce another database.

[reichert621]

Relevant thread: https://news.ycombinator.com/item?id=27973497