chore(server): integrate request tracing and auto-start services

- Add RequestTracingMiddleware to middleware chain
- Auto-start scheduler for auto-scanning on server boot
- Auto-start watch mode for all libraries with 2-second delay
- Update SetupRoutes to return handler for service management

cmd/server/main.go

@@ -64,6 +64,7 @@ func main() {
 	e.Use(echomiddleware.Logger())
 	e.Use(echomiddleware.Recover())
 	e.Use(echomiddleware.CORS())
+	e.Use(ratelimit.RequestTracingMiddleware(cfg))
 
 	// Rate limiter for auth endpoints
 	rateLimiter := ratelimit.NewRateLimiter(ratelimit.DefaultRateLimiterConfig())
@@ -148,7 +149,19 @@ func main() {
 	e.Static("/static", "static")
 
 	// Routes
-	handlers.SetupRoutes(protected, queries)
+	h := handlers.SetupRoutes(protected, queries)
+
+	// Start scheduler for auto-scanning
+	go h.StartScheduler()
+	defer h.StopScheduler()
+
+	// Start watch mode for all libraries (background)
+	go func() {
+		time.Sleep(2 * time.Second) // Wait a bit for server to be ready
+		if err := h.StartWatchModeForAllLibraries(context.Background()); err != nil {
+			log.Printf("Warning: failed to start watch mode for libraries: %v", err)
+		}
+	}()
 
 	// Dashboard route (protected)
 	protected.GET("/dashboard", func(c echo.Context) error {