refactor(runtime/v2): simplify app manager (#22300)

server/v2/api/rest/handler.go

@@ -20,12 +20,12 @@ const (
 	MaxBodySize     = 1 << 20 // 1 MB
 )
 
-func NewDefaultHandler[T transaction.Tx](appManager *appmanager.AppManager[T]) http.Handler {
+func NewDefaultHandler[T transaction.Tx](appManager appmanager.AppManager[T]) http.Handler {
 	return &DefaultHandler[T]{appManager: appManager}
 }
 
 type DefaultHandler[T transaction.Tx] struct {
-	appManager *appmanager.AppManager[T]
+	appManager appmanager.AppManager[T]
 }
 
 func (h *DefaultHandler[T]) ServeHTTP(w http.ResponseWriter, r *http.Request) {

server/v2/api/rest/server.go

@@ -45,7 +45,7 @@ func (s *Server[T]) Init(appI serverv2.AppI[T], cfg map[string]any, logger log.L
 	}
 
 	s.router = http.NewServeMux()
-	s.router.Handle("/", NewDefaultHandler(appI.GetAppManager()))
+	s.router.Handle("/", NewDefaultHandler(appI))
 	s.config = serverCfg
 
 	return nil