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/handler/post_handler.go

@@ -181,9 +181,6 @@ func (h *PostHandler) List(c *gin.Context) {
 	case "hot":
 		// 获取热门帖子
 		posts, total, err = h.postService.GetHotPosts(c.Request.Context(), page, pageSize)
-	case "recommend":
-		// 推荐帖子（从Gorse获取个性化推荐）
-		posts, total, err = h.postService.GetRecommendedPosts(c.Request.Context(), currentUserID, page, pageSize)
 	case "latest":
 		// 最新帖子
 		if userID != "" && userID == currentUserID {
@@ -245,9 +242,6 @@ func (h *PostHandler) ListByCursor(c *gin.Context) {
 	case "hot":
 		// 获取热门帖子
 		result, err = h.postService.GetHotPostsByCursor(c.Request.Context(), req)
-	case "recommend":
-		// 推荐帖子（从Gorse获取个性化推荐）
-		result, err = h.postService.GetRecommendedPostsByCursor(c.Request.Context(), currentUserID, req)
 	case "latest":
 		// 最新帖子
 		result, err = h.postService.ListByCursor(c.Request.Context(), userID, includePending, req)