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.

cmd/server/app.go

@@ -16,13 +16,14 @@ import (
 
 // App 应用程序结构体
 type App struct {
-	Config      *config.Config
-	DB          *gorm.DB
-	Router      *router.Router
-	PushService service.PushService
-	GRPCServer  *runner.Server
-	Server      *http.Server
-	Logger      *zap.Logger
+	Config        *config.Config
+	DB            *gorm.DB
+	Router        *router.Router
+	PushService   service.PushService
+	HotRankWorker *service.HotRankWorker
+	GRPCServer    *runner.Server
+	Server        *http.Server
+	Logger        *zap.Logger
 }
 
 // NewApp 创建应用程序
@@ -31,16 +32,18 @@ func NewApp(
 	db *gorm.DB,
 	r *router.Router,
 	pushService service.PushService,
+	hotRankWorker *service.HotRankWorker,
 	grpcServer *runner.Server,
 	logger *zap.Logger,
 ) *App {
 	return &App{
-		Config:      cfg,
-		DB:          db,
-		Router:      r,
-		PushService: pushService,
-		GRPCServer:  grpcServer,
-		Logger:      logger,
+		Config:        cfg,
+		DB:            db,
+		Router:        r,
+		PushService:   pushService,
+		HotRankWorker: hotRankWorker,
+		GRPCServer:    grpcServer,
+		Logger:        logger,
 	}
 }
 
@@ -57,6 +60,11 @@ func (a *App) Start(ctx context.Context) error {
 	// 2. 启动推送 Worker
 	a.PushService.StartPushWorker(ctx)
 
+	// 2.1 热门榜定时重算
+	if a.HotRankWorker != nil {
+		a.HotRankWorker.Start(ctx)
+	}
+
 	// 3. 创建 HTTP 服务器
 	addr := fmt.Sprintf("%s:%d", a.Config.Server.Host, a.Config.Server.Port)
 	a.Logger.Info("Starting HTTP server",
@@ -104,6 +112,11 @@ func (a *App) Stop(ctx context.Context) error {
 	a.Logger.Info("Stopping push worker")
 	a.PushService.StopPushWorker()
 
+	if a.HotRankWorker != nil {
+		a.Logger.Info("Stopping hot rank worker")
+		a.HotRankWorker.Stop()
+	}
+
 	// 4. 关闭数据库连接
 	a.Logger.Info("Closing database connection")
 	sqlDB, err := a.DB.DB()