Highlight excerpt from search result where match occured
Highlight excerpt from search result where match occured

Because there is no native support for the requisite Postgres function
`ts_headline()` in the PgSearch gem, this uses a rudimentary workaround.
The composed SQL is basic and likely full of security holes.

This commit serves more as a proof-of-concept for how this behavior
could be implemented.

codeunion/api.codeunion.io,chrisswk/api.codeunion.io,codeunion/api.codeunion.io,chrisswk/api.codeunion.io