refactor: remove Gorse integration and implement HotRank feature

- Removed Gorse-related configurations, handlers, and dependencies from the codebase.
- Introduced HotRank feature with configuration options for ranking posts based on recent activity.
- Updated application structure to support HotRank processing, including new caching mechanisms and database interactions.
- Cleaned up related DTOs and repository methods to reflect the removal of Gorse and the addition of HotRank functionality.

internal/repository/comment_repo.go

@@ -72,7 +72,6 @@ func (r *CommentRepository) Delete(id string) error {
 			if err := tx.Model(&model.Post{}).Where("id = ?", comment.PostID).
 				UpdateColumns(map[string]interface{}{
 					"comments_count": gorm.Expr("comments_count - 1"),
-					"hot_score":      gorm.Expr("likes_count * 2 + (comments_count - 1) * 3 + views_count * 0.1"),
 					"updated_at":     gorm.Expr("updated_at"),
 				}).Error; err != nil {
 				return err
@@ -102,7 +101,6 @@ func (r *CommentRepository) ApplyPublishedStats(comment *model.Comment) error {
 		if err := tx.Model(&model.Post{}).Where("id = ?", comment.PostID).
 			UpdateColumns(map[string]any{
 				"comments_count": gorm.Expr("comments_count + 1"),
-				"hot_score":      gorm.Expr("likes_count * 2 + (comments_count + 1) * 3 + views_count * 0.1"),
 				"updated_at":     gorm.Expr("updated_at"),
 			}).Error; err != nil {
 			return err