Update imported fact-check tag creation (#2027)

While I was testing backlog imports locally,
I noticed that the tags were being created,
but not added to the fact check.

This happened because we associate them with the project media
(here:check-api/app/models/bot/fetch.rb ) and not the fact-check itself,
and those are now separate things.
Meaning, we need to add them to the fact-check itself.

Relates to: 5227
PR: #2027

app/models/bot/fetch.rb

@@ -259,6 +259,7 @@ def self.set_claim_and_fact_check(claim_review, pm, user, team)
       fc.title = self.get_title(claim_review).to_s
       fc.url = claim_review['url'].to_s
       fc.summary = self.get_summary(claim_review).to_s
+      fc.tags = claim_review['keywords'].to_s.split(',').map(&:strip).reject{ |r| r.blank? }
       fc.user = user
       fc.language = fc_language
       fc.publish_report = true