FIX: hot not adding recently bumped topics (#25619)

When we insert into the hot set we add things with a score of 0
This means that if hot has more than batch size items in it with a score, then the 0s don't get an initial score

This corrects the situation by always ensuring we re-score:

1. batch size high scoring topics
2. (new) batch size recently bumped topics

* Update spec/models/topic_hot_scores_spec.rb

Co-authored-by: Isaac Janzen <50783505+janzenisaac@users.noreply.github.com>

---------

Co-authored-by: Isaac Janzen <50783505+janzenisaac@users.noreply.github.com>

spec/models/topic_hot_scores_spec.rb

@@ -6,6 +6,28 @@ RSpec.describe TopicHotScore do
     fab!(:user2) { Fabricate(:user) }
     fab!(:user3) { Fabricate(:user) }
 
+    it "also always updates based on recent activity" do
+      freeze_time
+
+      # this will come in with a score
+      topic = Fabricate(:topic, created_at: 1.hour.ago, bumped_at: 2.minutes.ago)
+      post = Fabricate(:post, topic: topic, created_at: 2.minute.ago)
+      PostActionCreator.like(user, post)
+
+      TopicHotScore.update_scores
+
+      # this will come in in the batch in score 0
+      topic = Fabricate(:topic, created_at: 1.minute.ago, bumped_at: 1.minute.ago)
+      post = Fabricate(:post, topic: topic, created_at: 1.minute.ago)
+      PostActionCreator.like(user, post)
+
+      # batch size is 1 so if we do not do something special we only update
+      # the high score topic and skip new
+      TopicHotScore.update_scores(1)
+
+      expect(TopicHotScore.find_by(topic_id: topic.id).score).to be_within(0.001).of(0.861)
+    end
+
     it "can correctly update like counts and post counts and account for activity" do
       freeze_time