PERF: Enqueue Job::BackfillBadge in Jobs::BadgeGrant (#30945)

This commit updates the `Jobs::BadgeGrant` scheduled job to enqueue on
`Job::BackfillBadge` regular job for each enabled badge on the site.

The rationale for this change is that we started seeing the
`Jobs::BadgeGrant` job taking hours on sites with lots of enabled badges
as well as users because the job was backfilling all enabled badges
serially within the job. This is bad as it means that a `mini_scheduler`
thread is tied up
by this job thus reducing the overall capacity of `mini_scheduler` for
hours.

app/services/badge_granter.rb

@@ -110,7 +110,7 @@ class BadgeGranter
         WHERE notification_id IS NULL AND user_id = :user_id AND badge_id = :badge_id
       SQL
 
-      UserBadge.update_featured_ranks!(user.id)
+      UserBadge.update_featured_ranks!([user.id])
     end
   end
 
@@ -404,8 +404,9 @@ class BadgeGranter
     post_clause = badge.target_posts ? "AND (q.post_id = ub.post_id OR NOT :multiple_grant)" : ""
     post_id_field = badge.target_posts ? "q.post_id" : "NULL"
 
-    sql = <<~SQL
-      DELETE FROM user_badges
+    if badge.auto_revoke && full_backfill
+      sql = <<~SQL
+        DELETE FROM user_badges
         WHERE id IN (
           SELECT ub.id
           FROM user_badges ub
@@ -415,17 +416,22 @@ class BadgeGranter
           #{post_clause}
           WHERE ub.badge_id = :id AND q.user_id IS NULL
         )
-    SQL
+        RETURNING user_badges.user_id
+      SQL
 
-    if badge.auto_revoke && full_backfill
-      DB.exec(
-        sql,
-        id: badge.id,
-        post_ids: [-1],
-        user_ids: [-2],
-        backfill: true,
-        multiple_grant: true, # cheat here, cause we only run on backfill and are deleting
-      )
+      rows =
+        DB.query(
+          sql,
+          id: badge.id,
+          post_ids: [-1],
+          user_ids: [-2],
+          backfill: true,
+          multiple_grant: true, # cheat here, cause we only run on backfill and are deleting
+        )
+
+      if (revoked_callback = opts&.dig(:revoked_callback)) && rows.size > 0
+        revoked_callback.call(rows.map { |r| r.user_id })
+      end
     end
 
     sql = <<~SQL
@@ -465,34 +471,41 @@ class BadgeGranter
       return
     end
 
-    builder
-      .query(
+    rows =
+      builder.query(
         id: badge.id,
         multiple_grant: badge.multiple_grant,
         backfill: full_backfill,
         post_ids: post_ids || [-2],
         user_ids: user_ids || [-2],
       )
-      .each do |row|
-        next if suppress_notification?(badge, row.granted_at, row.skip_new_user_tips)
-        next if row.staff && badge.awarded_for_trust_level?
 
-        notification = send_notification(row.user_id, row.username, row.locale, badge)
-        UserBadge.trigger_user_badge_granted_event(badge.id, row.user_id)
+    if (granted_callback = opts&.dig(:granted_callback)) && rows.size > 0
+      granted_callback.call(rows.map { |r| r.user_id })
+    end
 
-        DB.exec(
-          "UPDATE user_badges SET notification_id = :notification_id WHERE id = :id",
-          notification_id: notification.id,
-          id: row.id,
-        )
-      end
+    rows.each do |row|
+      next if suppress_notification?(badge, row.granted_at, row.skip_new_user_tips)
+      next if row.staff && badge.awarded_for_trust_level?
+
+      notification = send_notification(row.user_id, row.username, row.locale, badge)
+      UserBadge.trigger_user_badge_granted_event(badge.id, row.user_id)
+
+      DB.exec(
+        "UPDATE user_badges SET notification_id = :notification_id WHERE id = :id",
+        notification_id: notification.id,
+        id: row.id,
+      )
+    end
 
     badge.reset_grant_count!
   rescue => e
     raise GrantError, "Failed to backfill '#{badge.name}' badge: #{opts}. Reason: #{e.message}"
   end
 
-  def self.revoke_ungranted_titles!
+  def self.revoke_ungranted_titles!(user_ids = nil)
+    user_ids = user_ids.join(", ") if user_ids
+
     DB.exec <<~SQL
       UPDATE users u
       SET title = ''
@@ -509,6 +522,7 @@ class BadgeGranter
             AND b.allow_title
             AND b.enabled
         )
+        #{user_ids.present? ? "AND u.id IN (:user_ids)" : ""}
     SQL
 
     DB.exec <<~SQL
@@ -518,6 +532,7 @@ class BadgeGranter
       WHERE up.user_id = u.id
         AND (u.title IS NULL OR u.title = '')
         AND up.granted_title_badge_id IS NOT NULL
+        #{user_ids.present? ? "AND up.user_id IN (:user_ids)" : ""}
     SQL
   end