add module loaded state

module.go

@@ -13,6 +13,7 @@ type Module struct {
 	setup    setupFn
 	teardown teardownFn
 	depends  []string
+	loaded   bool // loaded indicates if the module has been set up
 }
 
 // ModuleOpts contains user-exposed options when defining a module.
@@ -48,3 +49,8 @@ func (s *Module) Logger() *slog.Logger {
 func (s *Module) Name() string {
 	return s.name
 }
+
+// Loaded returns whether the module has been set up.
+func (s *Module) Loaded() bool {
+	return s.loaded
+}