Feat: add skills space to context engine (#13908)

### What problem does this PR solve?

issue #13714

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

cmd/cli/ragflow_cli.go

@@ -7,6 +7,7 @@ import (
 	"syscall"
 
 	"ragflow/internal/cli"
+	"ragflow/internal/logger"
 )
 
 func main() {
@@ -17,6 +18,15 @@ func main() {
 		os.Exit(1)
 	}
 
+	// Initialize logger with appropriate level
+	logLevel := "warn" // Default to warn (quiet mode)
+	if args.Verbose {
+		logLevel = "info"
+	}
+	if err := logger.Init(logLevel); err != nil {
+		fmt.Printf("Warning: Failed to initialize logger: %v\n", err)
+	}
+
 	// Show help and exit
 	if args.ShowHelp {
 		cli.PrintUsage()

cmd/server_main.go

@@ -181,6 +181,9 @@ func startServer(config *server.Config) {
 	memoryService := service.NewMemoryService()
 	modelProviderService := service.NewModelProviderService()
 
+	// Initialize doc engine for skill search
+	docEngine := engine.Get()
+
 	// Initialize handler layer
 	authHandler := handler.NewAuthHandler()
 	userHandler := handler.NewUserHandler(userService)
@@ -197,10 +200,11 @@ func startServer(config *server.Config) {
 	searchHandler := handler.NewSearchHandler(searchService, userService)
 	fileHandler := handler.NewFileHandler(fileService, userService)
 	memoryHandler := handler.NewMemoryHandler(memoryService)
+	skillSearchHandler := handler.NewSkillSearchHandler(docEngine)
 	providerHandler := handler.NewProviderHandler(userService, modelProviderService)
 
 	// Initialize router
-	r := router.NewRouter(authHandler, userHandler, tenantHandler, documentHandler, datasetsHandler, systemHandler, kbHandler, chunkHandler, llmHandler, chatHandler, chatSessionHandler, connectorHandler, searchHandler, fileHandler, memoryHandler, providerHandler)
+	r := router.NewRouter(authHandler, userHandler, tenantHandler, documentHandler, datasetsHandler, systemHandler, kbHandler, chunkHandler, llmHandler, chatHandler, chatSessionHandler, connectorHandler, searchHandler, fileHandler, memoryHandler, skillSearchHandler, providerHandler)
 
 	// Create Gin engine
 	ginEngine := gin.New()
@@ -214,11 +218,15 @@ func startServer(config *server.Config) {
 	// Setup routes
 	r.Setup(ginEngine)
 
-	// Create HTTP server
+	// Create HTTP server with timeouts to prevent slow clients from blocking shutdown
 	addr := fmt.Sprintf(":%d", config.Server.Port)
 	srv := &http.Server{
-		Addr:    addr,
-		Handler: ginEngine,
+		Addr:              addr,
+		Handler:           ginEngine,
+		ReadHeaderTimeout: 10 * time.Second,
+		ReadTimeout:       60 * time.Second,
+		WriteTimeout:      120 * time.Second,
+		IdleTimeout:       120 * time.Second,
 	}
 
 	// Start server in a goroutine