fix: update code for error handling changes, remove unused code

internal/config/config.go

@@ -319,6 +319,7 @@ func (cfg *Config) loadRouteProviders(providers *config.Providers) gperr.Error {
 			lenLongestName = len(k)
 		}
 	})
+	results.EnableConcurrency()
 	cfg.providers.RangeAllParallel(func(_ string, p *proxy.Provider) {
 		if err := p.LoadRoutes(); err != nil {
 			errs.Add(err.Subject(p.String()))

internal/notif/dispatcher.go

@@ -89,7 +89,7 @@ func (disp *Dispatcher) dispatch(msg *LogMessage) {
 	task := disp.task.Subtask("dispatcher")
 	defer task.Finish("notif dispatched")
 
-	errs := gperr.NewBuilder(dispatchErr)
+	errs := gperr.NewBuilderWithConcurrency(dispatchErr)
 	disp.providers.RangeAllParallel(func(p Provider) {
 		if err := notifyProvider(task.Context(), p, msg); err != nil {
 			errs.Add(gperr.PrependSubject(p.GetName(), err))

internal/utils/functional/map.go

@@ -87,33 +87,6 @@ func (m Map[KT, VT]) CollectErrors(do func(k KT, v VT) error) []error {
 	return errs
 }
 
-// CollectErrors calls the given function for each key-value pair in the map,
-// then returns a slice of errors collected.
-func (m Map[KT, VT]) CollectErrorsParallel(do func(k KT, v VT) error) []error {
-	if m.Size() < minParallelSize {
-		return m.CollectErrors(do)
-	}
-
-	var errs []error
-	var mu sync.Mutex
-	var wg sync.WaitGroup
-
-	m.Range(func(k KT, v VT) bool {
-		wg.Add(1)
-		go func() {
-			if err := do(k, v); err != nil {
-				mu.Lock()
-				errs = append(errs, err)
-				mu.Unlock()
-			}
-			wg.Done()
-		}()
-		return true
-	})
-	wg.Wait()
-	return errs
-}
-
 func (m Map[KT, VT]) Has(k KT) bool {
 	_, ok := m.Load(k)
 	return ok